The 2011 Hellbent does not have camber. It's rocker-flat-rocker.
It's 10mm wider over the whole length. Weighs a bit more obviously, flex is very very similar to the old ones. Skis pretty much the same on the groomer as the old ones. Yes I have skied on them and the old ones, end claim. Still flaps like crazy and you still don't notice it unless you're going warp speed on the hard pack, but any reverse camber pow-plank is gonna suck at that anyway.
Super stable in pow. I didn't get to take it through the park so can't really comment on that. Swing weight maybe becoming an issue with that much tip...
Graphic is the sickest thing since Josef Fritzl.