My threads consistently get under a hundred replies, the most I ever got was 81. Sure, they rack up the replies quickly, but they don't stay up very long. Seems every one who has a say on the matter says it quickly.
My reviews get a decent amount of replies for reviews, but I think the user review section should be some kind of Index for what has been reviewed (like GameFAQS). Unlike a thread, you should be able to critique a review no matter how old it is without being accused of Necroing. Constructive Criticism is Constructive Criticism, after all.