You might consider it ironic, but a lot of the take out Chinese joints are operated by Koreans. The ones here are and I hear that it is pretty common.
The fact that a Mexican or a Korean prepares your #L4 dinner shouldn't matter since the cuisine really doesn't represent Chinese cuisine very well anyway. There SHOULD be a new culinary genre called "Chinese Take Out".
That's not to say that it sucks........I have a hard time NOT liking the stuff.