In my experience, there's never a straight answer to the question "Is Peter Chang here tonight?". At least not in Atlanta, nor in Knoxville.
I can thank Mr. Chang for opening the door to flavors and dishes from Sichuan, but in all honesty, I have since had Sichuan cuisine as good (on a good night at Jin River) and better--Chengdu Taste in Las Vegas and the street food stall at Flushing's New York Food Court.
What's most important to Mr. Chang is his family, centered in the D. C. area. He's had years in kitchens, and in all frankness its not an easy life. Kudos to him for finding a way to stay out of the kitchen, rather than in.