I was at Killington a week ago and had a chance to think about this discussion while skiing and watching others. The Killington School was there next to the Bear Mt. chair and we could observe from the chair their way of bumping. They are competition bumpers. It was a lot of fun and educational. Plenty of slip sliding, but some carving too - carving based on my definition - carving in the bumps.
There was also a practice section with a long, flat, somewhat icy stretch between bumps. This was a course where the athletes practiced slipping into a bump. There was also a ramp type bump where ariels were being practiced.
Little kids, some looked as young a 5 were rippin it up - very impressive.
But the best part of the day from the stand point of this discussion was the opportunity to ski Devil's Fiddle with the team. They were freeskiing with their coach and the bumps were natural and east coast treacherous. I like this type of terrain. Anyway, they were going one at a time in an informal contest. They were amazing and their style adapted nicely to the nasty terrain. Competition bump skiing does translate to other situations based on what I saw at Killington. These guys, girls included, could turn and the turns were solid and functional. They tended to stay toward the upper part of the bump the entire time - quick feet too.
One of the girls won because of her air!
I still prefer rounded turns with edge set and bent ski. But for me mixing it up is where it's at. There is no doubt based on what I saw that this style is functional in natural terrain.