A good source of New England conditions is the AlpineZone forums: http://forums.alpinezone.com/
Natural snow trails anywhere are going to have "thin" spots. i.e,. hitting rocks (or at least dirt) is unavoidable unless you stick to the trails with man-made snow.
In past years I've been to Sugarbush and MRG on consecutive days and found that Sugarbush had far worse conditions than MRG did. There's something to be said about limiting skier traffic.
As @crank said above -- yes, I've spent all of my Vermont ski days at Stowe so far this year. I can't compare their conditions to anyplace else. Every trip I've made has ended with the skis spending some time on the tuning bench to fix the edge damage. I don't think anybody in Vermont has anything approaching "great" conditions this season.