This is an interesting topic and I had recently read an article in one of the magazines that points out that fish, in the ocean, pretty much eat a little bit all day long. But since that is not possible for us, due to water conditions, that the fish will actually adapt to your feeding schedule. So I do not think there is a wrong way (except of course, overfeeding) just as long as your consistant.
Lemme see if I can't dig up that magazine...