Over on Suvudu, Ari Marmell is pointing out that writing advice which tries to tell you how your own creative process should work is bad writing advice. And he’s right; it’s not cool or helpful.
But what I’d like to see from a writing advice book (assuming I ever had reason to read another one) is an acknowledgement that people have different methods and that learning to write is in part an experimentation with process. It should have a chapter for outliners, with all the different methods for outlining, and a chapter for non-outliners with everything those writers need to know. And readers should be encouraged to study both chapters.
Of course, the best way to learn about writing is not from a writing advice book, but by studying the sort of books you love and want to write. Discover how they work. Create your own theory. Move forward from there.