honestly the marvel vs dc thing boils down to PR savvy, and how well the comics publishers are handling their demographic appeal. marvel now started out strong in comparison to how the new 52 was handled, and although they had hardly any more female writers (and no black writers, as far as I recall) than DC, they weren’t called out on it, perhaps because of kelly sue’s presence and the overnight sensation of the carol corps.
once DC’s films and tv shows start to pick up, (with the possible exception of constantine), and despite david goyer’s continued…presence…I think marvel’s cinematic failings are going to become more apparent. it’s good that fans are already starting to pick up on this and criticize it, because they should. I think it really hinges on marvel’s next announcement.
also both comics companies are still largely controlled by white men (to say nothing of hollywood or the movie industry), so until the comics publishers start making a concerted effort to hire writers who aren’t just white dudes for their diversity quota books, not much is going to change.