It's not just APS and THR, almost all of the forums I read and the one chat room I frequent are like that. You get three types of girls online (yes, yes, thank you, we have all read the bash quote, I'm talking about real women here): 1) the flirter who shows up for a month or two, attracts the attentions of every lonely male until one creeps her out and she disappears forever; 2) the lurker, who usually keeps her gender quiet; and 3) the active poster who don't take any crap and ingores dopey fawning boys.
Thankfully we don't have any 1's here, and we've got a good mix of 2's and 3's. Of course, since the 2's and 3's don't make a big deal about being a girl and give "hugs" and post pictures of themselves every single day, no one really remembers them.