MSF Training won't prevent some people from making terrible judgment calls in terms of what they're going to buy and how much time it can take to build up enough experience to that 800cc, 150hp motorcycle they've just bought. (Doesn't matter if it's a cruiser either. If you don't know how to manage your entry speed, you're screwed).
I think that although "..... collision claim frequency was 10 percent higher (in CA) compared with 28 states without those requirements", the claim frequency would be Even higher without any requirement for people under 21.
And, women represent 20-30% of students in "some" states. How many is "some"? If it were all 48 states that the curriculum is in, that would be a pretty strong argument for 20-30% of riders in the US being women? Hmmmm.
Article: Data show risk highest for new motorcycle riders. Wall Street Journal, April 15, 2012 http://online.wsj.com/article/AP45597fe150f74e8c881b0eb7c594e806.html