Ever the optimist, Anonymous. Fast does not = good, look at /b/ for an example of that. It doesn't have to be INSAAAANELY FAAAST to be decent.
animesuki isn't stupid because of what's being discussed or the post speed. It's because of the userbase (and no, believe it or not, /a/ is not and will not be dominated by animesuki, because they are faggots who are easily butthurt when insulted) and general immaturity.