Is being a QB from USC a curse for NFL players?

Just look at Carson Palmer who went to the Bengals and has been injured the past season. Matt Leinart is a bench warmer to a potential HOF player in Kurt Warner in Phoenix. And now Mark Sanchez who went to the Jets and just threw an interception on MNF. I don't think these "glory boys" know how to cope with being on a terrible team what has trouble having a .500 season.