My own experience (although I don't play on party) is that these 50 VPIP 1-5 PFR types do NOT raise their premium hands. Probably something to do with not wanting to 'lose customers'. As often as not they do it with total junk - nothing at all junk - or for some reason low suited connectors (they probably got hold of a copy of super system or something and read how Doyle Brunson loves these hands in NL). I have been looking these up lately with good success, and been amazed at some of the hands I have seen. The guy who HAS got a premium hand when he raises is the NIT who doesn't realise he's not playing in a full ring Slansky home game. He is like 14/7 and when he raises I run for the hills unless I really like my cards.