User blog comment:Kirkburn/Technical Update: March 25, 2015/@comment-26009167-20150326010528/@comment-26009167-20150326020605

Ah, ok, so that's why I never saw it. I haven't really deleted much recently aside from some IP userpages, and even that was through BatchDelete.

I attributed the 300+ comments not being deleted as Wikia trying to avoid putting too much load on the server at the time - it IS a lot of comments being deleted after all. I went through and deleted them all (regardless of whether they were hate or not - remember, I was putting the article on a fresh start!) when I saw that it didn't delete them. But yeah, if it doesn't do it in the future, I'll let staff know. :)