This is one of the better threads I have read on the subject. IMO the people who are focusing on the timing of certain calls and not just overall penalty stats are absolutely right. Joe Jackson hit .375 in the 1919 World Series. Does that prove he wasn't in on the conspiracy? Of course not. When did he get his hits? Etc etc. It's like shaving points in basketball. You don't have to suck. You just have to miss a shot here, a pass there, maybe let a guy get past you once. Six points right there on three plays. Enough to do the job in most games.
Now do I think it's a fix? No, not really. I think it's more of a subliminal bias. Just enough to change a call here or there. That's all it takes.