Personally, through all the years I've been training (over 20 now), I've recently come to the conclusion that the whole Idea of the "Full range of motion" is bullshit. All that does is puts a lot more stress on your joints. Since I've stopped doing that, and doing more of a half to 3/4 range of motion, I get no joint pain, plus I'm getting good results.
You mention Jay Cutler only doing half reps, well he's a pretty big guy, who trains relatively light compared to some other pros (PLus I think he won Mr. Olympic or something;D), and I can't ever remember hearing of him having an injury. So I can't think of any reason to criticize his training.