I don't know... I'm on another forum with about 100 active members, and even though I've only been there a couple of months, I can recognize all the names, and the majority know me as a crazy emu with a death wish.

At Gaiaworld they might not know people the same we all know each other at Zel, but they can probably recognize most names, and know bits and bobs about a large number of the other members.

Either that or it's a community of 50 who post every second of every day and reply to posts the moment they've been posted.