I'm not sure this contradicts what you said, but the terms are a little different.
When I looked at the ski, the line toward the front was labeled "All Mountain." The line toward the rear was labeled "freeride."
From what I know (and it may not be much - and I'm not a pro) mounting farther forward makes the ski quicker. For park riding, it seems you'd want it as close to the center as possible so the swing weight is balanced. For aggressive, fast skiing (directional?) you'd want it farther back for stability.
I'm leaning toward 1 cm behind the "All Mountain" line. I will give up a (tiny) bit of quickness in the trees in return for a (tiny) bit more stability at speed.
Sound like correct thinking?
My reasoning: if I wanted to kill the mountain, I'd get a pair of Chochises. But I want to turn quickly in the trees and will only be going fast back to the lift. But as I get used to the skis, I won't need the help of the ski as much and will want that little bit more stability.