Personally, I don't -really- care about word counts. I mean, it's kinda like assuming that more content = more fun, but who's to say the content's even good? And I find quality kinda fails when you're trying to fill up that text box. I have partners that will give me a good paragraph each post, but it goes exactly like this, in the simplest language necessary:
Character does this. "Character says something." Character does something else. "Character says even more, Character asks a question." Character performs yet another action. "Character asks another question, no wait, two questions!" Character does, of course, something else again, and finishes it off with "One. More. Question."
Truthfully, there's no detail, there's no mood... Granted, some of my partners who are guilty of that are still giving me the funnest RPs I'm involved in at the moment, but I don't think it's a good habit. I mean people assume more words means more detail and by the example I've given above, it certainly doesn't. It's just like... Pressure to post more. I do the same thing. I decide how my character's going to respond, what they do, think, and say, and then write my post. When I fall short of matching my partner, I get insecure and, unable to find meaningful detail to add, just make my character say, think, and do more.
'Tis a shame.