Aah, found something. Our WRT has under 50k posts.

Their 18+ thread has about 3.6 million posts.
Their "Gold Bump" thread has about 1.7 million posts.
They have a couple of gay/lesbian threads that have over 2 million posts each.

These aren't even their Record Threads, which I still can't seem to find the highest one...

Aah. Found it. Their "MPT" has nearly 6 million posts. Million Page Thread

This is why I found the video to be pathetic.