I have no doubt that what you say is true.And as I said earlier the only exposure I've ever had to Chinese food (here or in or near China) is the "Cantonese" style so that's the only type about which I can speak with any credibility.And for the record,in my neck of the woods "Cantonese" is the most commonly found regional style.Of course that may vary in other parts of the country.
Wiki says Cantonese is the most popular in America. I might have to bow to them, Szechuan tends to be very spicy, so it’s definitely more popular down here in Tucson where we’re well trained in food that fights back. Of course Szechuan gets a lot hotter than Mexican, which could be why we go after it, once you’ve gotten to the point where habanero doesn’t scare you any more you’ve got to go find a bigger burn. No idea which places are “more authentic” but if it tastes good I don’t care.