It's strange you bring those figures up because they're pretty similar to Tom Brady's 2013 season as well.
Brady's completion is 80% behind LOS and 65% from 1-10, and drops to 46% from 11-20 yards.
Brady is 10 for 44 on passes over 21 yards this season (22.7%).
And while Cam hasn't hit the deep ball this season, he has proven he can in the past. As a rookie, he hit 29 for 80 (36%), and in 2012, he was 24 for 58 (41.3%).
For some perspective, Peyton Manning's incredible 2013 season has him at 14 for 38 (36%). Brady's 2007 season was 28 for 69 (40.5%).
So Cam Newton's 2013 season hasn't been great, but he's proven he can do it, and at a very respectable rate. I'd put this more on a seriously diminished Steve Smith and a bunch of JAGs at receiver.
And as for all the PFF hate, they make mistakes. So does BB. So does everyone on this board. But ESPN found pretty similar results on Newton under pressure last season:
http://espn.go.com/blog/statsinfo/post/_/id/36168/cam-newton-at-his-best-under-pressure
I'm just curious how many Panthers games people have seen this season. I only caught bits of the 49ers game and he didn't seem panicky at all so I'm wondering what those opinions are based on.