Here at Mammoth they groom "Cornice Bowl" all the %$%#!time! What a joke! They should rename it "Punter Bowl" They groom it after just about every storm. Sometimes, they groom Scotty's too. I hate how they have ruined so much good skiing. Hell, here in the Eastern Sierra, the wind does a better job buffing the snow, than any snow cat. Oh well, you would proably love it quadride. It is pretty steep, and would be solid advanced terrain, if it were not groomed. Of course, this means it is covered with "advanced intermediates" quite a few of whom end up taking a really long slide. It was much safer when you had to drop in, and there was only nature's grooming. Now, people get inside, and fall the whole way, often taking someone else with them. It is very entertaing on a Saturday morning.
By the way, much more terrain is winch catted, than you might expect. Especially in low snow years, they can pull snow off of flat sections, and up onto steeper areas that get really scraped. Many steep blues get winched here.