I can't speak for the 2009 model, but since the 2010 model they have added Harshmellow. As for the all-terrain rocker, yes it is flat camber in the middle. It's 70% flat and 30% rocker with the tip having a medium rise and the tail having a low rise.
The Harshmellow made a pretty big difference in dampness. I'm a big fan of that tech
I don't get that leg rock when I land jumps (not that I do huge jumps though).