Let's take a look at some hard numbers.
Using: WritingForums.org
Only 92,107 of their total of 689,475 (13% of their posts) are in the literary forums.
They have 12,607 threads in their literary forums vs (92,107-12,607) = 79,500 comments, which comes out to 6.3 literary comments per piece.
By comparison, YWS has 816336 posts, 302,986 of which (37%, nearly TRIPLE that of writingforums.org) are in the literary forums. We have 47,384 threads vs (302,986-47,384) = 255,602, which comes out to 5.3 literary comments per piece. We only average one less review per piece, with more than 3.75 times the number of threads to go through.
And the kicker throughout all this? They have more than twice the number of members we do (26,718 vs. 17,168). Our members post more, review more, and are overall more active, especially in the literary forums.
A Caveat: this is only a comparison between YWS and one other writing website. I have no idea the statistics for the other sites you've listed, but would be glad to do the leg work to see what they come out to be, if you would give me the links of those sites. Also, I'm no master statistician, so if you see anything wrong with my logic, let me know. I used a combination of the total posts/threads information found on YWS and Writing Forums pages, as well as manual calculations to determine total number of posts and threads in literary forums.
--D
PS:If you go to the homepage, you'll see a few "Featured Works"--works that have garnered the most "Likes" in a three day span.
