Very true. I know whenever I go to a Chinese restaurant, it is so far away from what I had in China (HK/Taiwan mainly)! Or what my Chinese family cooks! It most of the time has too much grease, too much sugar, too much caramelized sauce, too much tasteless frozen/boiled meat...!
The saddest part though is that, most of the times, the restaurant owners really are Chinese and should know better. But it looks like, compared to Italians, Chinese folks have no problem adapting to the countries they are in and selling the foods Western people want (packed of grease and sugars!) to make money. They certainly do not have this much puritanism as dear old Italians have about their food! (Che sfortuna)