I don't at all think everyone is like that, but that's how the board is run. There are some GREAT people on PS, but the politics kinda keep everyone in check. It's a great place to ogle, though. That's for sure!
I only occasionally lurk on PS now, partly because of their anti-moissy/lab stones stance which does not work for me since I love my moissanite (except it is okay to post about lab diamonds in the near dead lab diamond forum) and a few of the politics, or certain posters who could get a little...high and mighty on others. It can get a bit...consumerist...too. Not surprising given the focus is on diamond consumer education, but sometimes it can be a bit out of or distant from most people's reality (people owning multiple huge stones is not the norm for most people I know in real life!) and add a lot of pressure on some that I saw.
They used to, a long long time ago, be more open about moissy, etc. Now people have to skirt around it (even though a few there do wear moissy or CZ as well!) and suspected posts of alternatives get sniffed out (not all though, there are some I remember being suspect about that never seemed called out or anything!).
They do have great eye candy and are a great resource for learning about diamonds, gems, metals, settings, etc.