I'll stick my 3 cents in... and it's getting very hard to find those 3 cent pieces... 8^)
I shoot light Hills... any more, mostly very light, but back when I was collecting them (at one point I had over 30) I found many more heavies than in other bow brands. No scientific studies or surveys, but I came to two conclusions, which probably feed each other. I think the fact that Howard shot heavies for most of his life had an awful lot to do with influencing others, and probably still does. However, he had to drop the weight as he aged. I have one of the last bows he built for himself, and it's 50#.
The thing that feeds into this and becomes a chicken/egg issue is that the particular style really does like heavy arrows and they in turn respond well to more draw weight. So you have a situation in which guys who like heavy arrows for large game gravitate toward a bow design that shoots such arrows well... or vice versa.
Because of this, you find a lot of chatter on Hill threads about or from guys who shoot the heavy weights. Others read that and feel like, "I gotta try it..." And so it goes.
It always concerns me a bit because I believe that shooting really heavy bows over a period of years, quite possible when you're younger, carries a high potential price when you're older... You may have to give up archery before you want to if you make it into your late 60's or 70's. I never shot real heavy, only up into the 50's, but a few years back I had to start dropping weight and now, at 72, my regular bow is 22#. A good afternoon session with 30 to 35 can cause enough pain to cost me the ability to shoot the second day of a 3D. Shooting somewhat lighter as a regular thing and building weight before the hunting season is probably a better long term plan. Used to be, most shooters had two bows, one for competition season and one ten pounds heavier for hunting.