From this video, we can see that most of American people prefer the Americanized Chinese food over the traditional Chinese food.
Because of the difference from culture, habits, tastes, they made a combination of foods. But the food combined has a little bit different between the traditional food and Asian-American food
Most popular Chinese food in the U.S. is loaded with salt and sugar, so it tastes sweeter, saltier, and can often be greasier than authentic Chinese food. Actually, Chinese people like to use several different spices, a little of each kind, in one single dish. Besides salt and sugar, there are many other common spices in China, including dried chili, wild pepper, star anise, Chinese cinnamon, soybean source, water chestnut powder, etc. MSG is also widely used in China – you can find it in almost every Chinese traditional dish.
The combination changed the traditional! But I think this is a good change.