[geojedi]

Personally, I think it's a reflection of the shooters.

Stand-up style.
Wait, 80% of the goals are scored in the bottom foot of the net...
Butterfly style.
Wait, shooters are just waiting for us to drop and throwing them over the shoulders...
Hybrid style.
Keep 'em guessing.

There is a correlation with the successes any goalie may have in the NHL.
i.e. So&So plays this way and his stats were off the hook, I need to copy that and I'll be the toast of my league too!
As more people adopted the Roy-Quebecois BF and made the NHL, more of us pulled a lemming on our style.
Today there are more goalies that don't BF for everything and are successful (Brodeur, Ellis, Nabokov, Kipprusoff, Osgood, Turco, etc.) Time to play a new style....