The fish and mediocre players play PLHE better, IMHO because they can't hang themselves with obvious over-bets and tend to bet the pot more often instead of all sorts of gay stuff that's easy to read and draw against.
Also, many times PL prevents fish from making big preflop mistakes. Sure they still make mistakes but they don't hurt as much.
The artist formerly known as Knish
Only mediocre players are always at their best. Phil Ivey Owns You