To play a moderate amount of Devil's Advocate...
I don't recall Cutler doing those things in Denver. I don't recall hiom throwing off his back foot. Yet, all of a sudden, when given Chicago's tour de force of coaches, he regresses and starts similar things to what Rex did. Seriously, is the staff teaching that? I'm sure they're not...but dang. Something is not right with this staff.
Just giving it an eyeball test... Orton is doing better than expected, and Cutler is doing worse than expected. That simple test says that something is wrong in Chicago. We know there's more to it, like Denver becomeing solid on D, having a better OL, having MUCH better WR's...etc. But, I think it also infers inpetness in preparation.
If I'm wrong, and Cutler was prone to throwing off the back foot in Denver, please let me know. I just didn't watch much of Cutler last year.