i think what most people argue is you shouldn't have to pay that much for chinese food. especially when there are some really inexpensive and quite good asian flavors down in little siagon.
no offense, but imho, pf changs is a restaurant for those who aren't as exposed to as much culture as others; as are most huge national chains regardless of cuisine type. but then again, i grew up in orlando and moved to seattle which is pretty much the best city in america for mid-priced non-chain restaurants, so it really opened my eyes to the fact that there are so many other eating establishments out there that are better. then of course also having the privilage to travel to many parts of asia, i got to experience asian cuisine at its origin which made it much more evident that big chain american asian food kinda sucks. therefore, i just choose to never go back to big chain eating unless i have to.
of course, there is always the age-old formula... if you see a lot asian people eating in a certain asian restaurant and not another, there is probably a good reason.