The Fortune Cookie Chronicles, by Jennifer 8. Lee, start with the statement that "There are some forty thousand Chinese restaurants in the United States - more than the number of McDonald's, Burger Kings, and KFCs combined." That seemed a little odd to me, so I pulled out the Bozeman phone book and started looking up resturants. Bozeman has two McDonald's, 1 Burger King, and 1 KFC, for a total of 4; it has five Chinese restaurants, including the one in the mall food court, plus a Mongolian Barbecue that doesn't really count as traditional Chinese-American food. So that leaves Chinese restaurants slightly ahead, just as Lee said.
On the other hand, Bozeman has at least 8 Mexican restaurants.
In checking out the Fortune Cookie Chronicles blog, I found a neat site on how to order Chinese food. Of course, it is designed for people traveling in China, but it is interesting to see which dishes are acutally made in China - as Lee points out, Chinese-American food is its very own style and has only passing similarities to the food eaten in China. This appears to be characteristic of Chinese food overseas, since Lee also mentions several other distinctive varieties such as Chinese-Indian and Chinese-Korean.