I actually didn't think that Penn State would fall off that much this year. The real damage seems like it will come in upcoming seasons, as weaker recruiting classes take over.
I was a bit surprised by their terrible start, but they've gotten back on track quickly. I think O'Brien has done a good job, but I'd still put him way behind Bill Snyder.
I'd put Cutcliffe and Will Muschamp over him, as well. Going 6-2 at Duke is amazing. And I think Muschamp has exceeded all expectations this season (unfortunately).