^There's definitely no consensus. In fact, when Marco Palmieri was still the editor and still posting on this forum, I seem to recall he disliked the whole idea of trying to force the books to fit a TV-season formula, because the whole thing he was trying to do was to embrace the new possibilities of the book format and take things in a direction a TV show couldn't have gone.
So please don't think of the "season" thing as anything more than a conceit held by a few fans. It's really not a legitimate interpretation of the books at all. At best, it's a very rough and imperfect analogy.