Sherman,
My only comment would be position is pretty key for a lot of players. I'm sure I raise 2x or more from LP as EP, so taking my UTG,UTG+1,MP1 folds and deciding I'm 10% VPIP is pretty dangerous I think.
I keep track of my table stats, and I'm surprised how much they vary table to table. For really tight players this would be less true, but still significant.
Edit: It may just be the Search user that sucks.
Making reads based on minimal information