Well I got a fairly high post count but I don't post cram....in fact I've been here longer than some people and they have a higher post count than I do. I mean look a Kitana.....she's been around here for a long time and she doesn't have that many post counts...in fact if she wasn't a mod I would think that she was a fairly new member. So sometimes post counts can be deceiving.
And post counts don't separate vetrans from newbies ...not really....Look at BAB he came hear after me and has more post counts than me and he didn't post cram.....when he first came he replied to nearly every topic and made fairly long posts....and look at his post count now.
So yes sometimes post counts show you who is new and who isn't but there is always some exception.