QUOTE(johnb @ Dec 11 2007, 09:26 PM)

That's simply not true. First, the number is 51%, not 50%, and in genetics that's a meaningful distinction.
According to the Certified Angus Beef producer website at www.cabpartners.com, they say the 51% is hair, not genetics. The animals must be
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at least 51% black-hided
and/or enrolled in the "AngusSource" program, which guarantees that they're sired by an Angus bull, to qualify for CAB. The bull provides 50% of the genetics to the animal; there's no requirement in the program that there be any Angus on the maternal side whatsoever. Maybe there is some. Maybe there isn't.
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More importantly, the carcass must meet a number of other specifications related to the quality of the meat--the 51% merely qualifies it for taking the test, if you will. The majority of qualified carcases, about 80%, don't meet all of the criteria, and don't qualify (ie fail the test and are not certified), and that can and often does include 100% registered Angus carcases.
Back to the National Beef Quality Audit. It's quite a stretch to say the "majority" of carcasses don't meet all the criteria, since some of the criteria are awfully inclusive. Let's go down the list.
1: Modest or higher marbling. Per the latest NBQA (2005), 23 percent of carcasses surveyed met this standard. Okay, that one actually makes a difference.
2: Medium or fine marbling texture. (no data collected)
3: "A" maturity for each, lean and skeletal characteristics (97% met this standard)
4: 10 to 16 square inch ribeye area (95.2 percent met this standard)
5: Less than 1000 lb hot carcass weight (92.1 percent met this standard)
6: Less than 1 in fat thickness (96.7 percent met this standard)
7: "Superior" muscling (no data collected by NBQA, but this is fairly subjective and evaluated by visual exam of live animals)
8: Practically free of capillary rupture (bruises) - 65% of carcasses met this standard
9: No dark cutters (this only eliminated 0.4 percent of carcasses)
10: No neck hump exceeding 2 inches (92% didn't display >4in of hump; NBQA didn't break it down past that. Also evaluated by visual exam of live animals.)
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One of those criteria, by the way, is that there be no more than 2" of neck hump, which pretty well eliminates any meaningful level of Brahma cross.
Also debatable; I'd guess it eliminates anything above half
Bos indicus, but that's still significant enough to affect meat quality. Plus, when you can have cattle as young as 9 months old coming to market, it's not at all likely a Brahma cross animal like a Brangus would have developed a hump big enough to eliminate them by that time. And finally, this is all being evaluated by visual exam on a live animal, and I'd be very surprised if they're going over each animal with a ruler to see how big its hump is - it's going to be a thumbs-up or thumbs-down as the animal walks by the evaluator.
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Nobody is saying the program is perfect nor that there isn't better beef to be had out there somewhere, but it's not a bad starting point for someone who is looking for a decent steak in the neighborhood supermarket. Certainly those tests will eliminate the sort of meat to which you refer.
Except that then we get into the issue of whose standards are really being followed. At last count there are 47 different "Angus" branded beef programs - in addition to the CAB program, each major packer and quite a few supermarket chains have their own version of Angus beef with yet another set of standards, many of which don't go into this level of detail and are more permissive as far as carcass weight, marbling, and acceptable grade. CAB has actually added criteria over the last couple of years, including the AngusSource program and the ribeye area specification, to try to differentiate themselves from these other programs.
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And the inspections are done by USDA inspectors, not employees of the packing houses.
The carcass inspections and grading are done by USDA because the law requires it. But the live carcass evaluations, such as do they have enough black hair, do they display "superior" muscling, is there or isn't there a noticeable hump, etc., are being done by the packers, not USDA.
All this being said, the "Angus" designation in whatever form is not a complete waste of time. It does tell you that, in most cases, the beef has received at least a USDA Choice grade, although some of the supermarket and packer programs include Select graded beef in their Angus program. Assuming it's Choice, a lot of the programs do specify top 2/3 of Choice. But you'd get equal assurance from one of the non-breed-specific branded beef programs like Niman Ranch - and it's far more likely with those that you're going to get exactly what you intend to buy. It's a lot easier to identify one or two programs to look for than it is to hit the one of 47 targets you're actually aiming for.
If you're curious as to how the programs break out, which ones guarantee you which standard, or which one your supermarket or vendor is actually selling, USDA lists them all at
http://www.ams.usda.gov/lsg/certprog/certbeef.htm.
Sources: "Supply Development Facts,"
http://www.cabpartners.com/news/CABFactsheetSD.pdf; "The Premium Beef Market and the Certified Angus Beef Brand,"
http://www.cabpartners.com/events/past_eve...CAB_mccully.pdf"Review of the 2005 National Beef Quality Audit", Texas A&M Meat Science Department,
http://meat.tamu.edu/nonconform/HaleNBQA.pdf (warning: this is big and slow to load; if you want to read it I'll be happy to post the copy I finally managed to download, with Don's permission).
"Report of the June-September 2005 National Beef Quality Audit: A New Benchmark for the US Beef Industry," Proceedings of the 2006 Beef Improvement Federation National Meeting,
http://www.bifconference.com/bif2006/pdfs/Morgan.pdf