Getting back to the original question:
I demoed the Chams for an hour or so last year. To a large degree, good skiing is good skiing, and you'll be able to use any technique appropriate to conditions. I agree with what Tricia said, "I felt like I benefited from staying somewhat balanced. I didn't feel like extra tip pressure did much for me." Chams have a relatively short part of the middle of the ski with traditional sidecut and camber. That means if you want to carve cleanly on packed snow, there's going to be a premium on staying centered (fore and aft). That middle part of the ski is what's capable of carving. As Josh Matta said, the tails aren't going to grip for you. Pressure will be mostly on the outside ski, as with any other pair of skis.
The benefits of the long rocker tip, reverse sidecut in the tip, and long pintail come to the fore when you're in soft snow. Release of the old turn and initiation of the new turn are very easy in those conditions. There, of course, pressure will be more equal between right and left skis, as with any other skis. The big rocker in the tip will give superior flotation. Stay centered fore and aft.
The Chams may be something of a rough ride over firmed-up crud, because the long rockered tip is going to ride up over the ruts rather than blast through them. But you'll certainly be capable of going over the nasty stuff, and the skis' design should minimize issues with getting stuck in frozen ruts.
Probably 95% of skiers will be smearing all of their turns on skis like these. (Not recommended in truly hard packed conditions.) But the skis are capable of holding an edge, and it's well worth working on carving technique even though that's not what they're principally designed for.