Cheers to the Americans and Canadian teams, and don't knock there play! I think it's great to see women's hockey growing as fast as it is here in America. And the woman and not scary looking, jeez.
The problem with growth of the sport may be ice time. Ice arenas are way more abundant in parts of our country. You probably won't see too many hockey players come out of, say, Alabama, where ice rinks are few and far between. Different story in Minnesota, Michigan and Massachusetts (where the majority of these women are from).
I would bet that this is also the case throughout the world.
Cheers to equal opportunity for both genders.