Just to pick a nit, I am under the impression that there are much more than 250 posts in the sequences given that Eliezer posted daily for about two years. (Of course we could stop speculating and count, but I can't be bothered) That would move the estimation much more in favour of a bot, but if its only feature is to save 40-50 hours, maybe there is something else we could do that simply isn't doable by humanpower.