Pros and Cons of various sites

Hi All,

A little while ago someone had posted an analysis of ZeeJustin's PokerStars history and many people commented on the fact that one site is not an adequate sampling. Be that as it may, that is not the point of this post. Many people, including Justin, stated that their success rate on PokerParty and others was better than their success rate on Stars.

I'm trying to understand these statements. I doubt strongly that any of these guys will deliberately play better or worse on various sites, so what gives? Why would one site give better results than another?

Any light you can shed would be appreciated.

Paulie