Quality of food that is sold as an ingredient matters most.
QUOTE(Al Dente @ Mar 13 2007, 10:51 AM)

What is your definition of "local"?
Mine is Pennsylvania, Virginia & Maryland.
A report may have been posted on the Pollan/Mackey thread at eGullet--I'm not sure--but at one point during the height of the growing season I went down to the Glover/G'town WFM and counted just how many local foods there were in the produce section around the time the company announced a campaign to supply more locally grown foods to the consumer.
This was a period when the so-called "Supermarket Pastorale" was joined by a "Carte du Jour" look: small hand-chalked smudgy blackboards w the words "Locally Grown in Maryland Swiss Chard" replacing the mechanically reproduced signs with names and prices in uniform font. A very, very small portion of the items sold were local. A major portion of local items were mushrooms from PA, the state that, from what I understand, is the California of funghi farming.
The situation is complicated and I am curious to see what developments take place in the next few years. Greater autonomy given not just to the huge regions of WFM, but to individual stores would help, but you also have to have local, knowledgeable and committed employees to restore a flexible Backdoor Policy.
I prefer my oranges to come from Sicily, Israel, South Africa, Florida or California. The fava beans that come from afar tend to be in better shape than the local organic ones, though I just don't remember any quite as gorgeous and healthy (vs. healthful) as those offered in other countries where they're not a novelty. I'd buy cardoons at the supermarket flown in from California for sure.
In general, I find that the quality of many vegetables does not suffer from long transport, though for the life of me I can't understand why the strangely bulbous bell peppers from Holland are in the store, selling anywhere between $5 to $7 a pound when there are bright red peppers at the farmers market. I just prefer to support small farms in the area. I also find a tender head of lettuce picked less than 24 hours superior to shipped ones that get water-logged under regularly timed streams of "mist".
Green beans and eggplant are two plants we treat as vegetables that are really far superior at the market. Okra, too.
However, it's really fruit that suffers from being picked unripe, treated, shipped long distances, etc. In this case, it's not just a matter of local vs. shipped. It's a matter of eating seasonal fruit. I don't understand why a place like WFM encourages its customers to buy huge, expensive organic tomatoes in February and March along with plums, peaches and the one kind of strawberry that large farms produce with swollen, hollow, white cottony centers.
If the company continues to maintain that principles govern the food it offers to shoppers, then seasonality ought to be stressed.
I also prefer my food whole: unpeeled carrots in the size that they were when they came out of the earth. Unbagged heads of escarole. Whole chickens less expensive than cut-up pieces as they used to be back in the day. Fish cut into fillets or steaks, but unmarinated and unstuffed. Don't let trend towards satisfying the non-cook compromise the options provided to shoppers who like to prep what they subject to heat.