Cocflower, I have to admit I don't understand your argument either.
Are you arguing that creationism is such a trivial idea that you don't think it is worthy of being taught by people who have studied it in detail and have opted to teach that subject area, and instead should be discussed in a Science class, despite it having nothing to do with Science?
Or are you arguing that it is so important that it should be part of all areas of the curriculum - Maths, Music, German and so on?
I also don't see what your list of learning styles has got to do with teaching one discipline within another one. We don't suddenly start teaching idioms in Animal Farm in a Maths lesson.
To get back to the topic of the OP, I'm not convinced that DA is right. I think the amount of time spent on evolution in the primary school curriculum is adequate. I don't think there is a need to increase the time spent on it.