We hosted an exchange student for a few weeks, and he was from Nanjing. Before he left the country, we took him to a Chinese restaurant and warned him that it was likely going to be more like American-Chinese.
He went through the menu and pointed out the dishes which were authentic and those which were not. I was surprised at how many were actually authentic -- it was about half of the menu. Maybe we were at a more authentic Chinese restaurant, as the menu was in both English and Chinese.
He was a great kid, and I really enjoyed the experience. He loved peanut butter and jelly, had to spit out ranch dressing, and did not care at all for pumpkin pie.
One other amusing bit, I had to stop him before he shoved an entire fortune cookie in his mouth and ate the paper. Those are 100% American.