I would not say that... I'd just say that it is very difficult for us to know. Different play calls, different D's, different WR sets, etc. A large number of variables can make situations more difficult without us being able to discern it.
I agree, just find it hard to believe they'd tip the scales for or against one of the QBs in an honest open competition, which I have no reason to not believe it is.
Seems more plausible that throwing off his backfoot is just a bad habit that Worley needs to break.... like Dobbs' and Peterman's bad habit of holding the ball too long and Ferguson's bad habit of being too loose with the ball.