I agree in principle GS... and not just on Asian food. It's like NY Pizza vs. Chicago or California. They're all good. They're different foods. For Asian food, however, I think the likelihood of it tasting good and having good variety is increased as it becomes more authentic. For example, substitute ingredients are used (you don't find sichuan peppercorns, certain varieties of fresh or dried chili peppers), certain types of dish (hot pot, xiao long bao), or certain proteins (organ meat, tendon, frog, rabbit, etc.). Of course lots of middle-American Chinese restaurants have special menus upon request. Although you generally need to know Chinese to read them.