I would think that it would be more a matter of the level of experience of the rider, which would determine if he or she dumped the bike more or less, rather than their gender.
As the "Ride like a Pro" video series points out, one does not need brute strength in order to ride a heavy cruiser bike like a Harley, or whatever make you choose. It is more a matter of cordination, balance, skill, and tons of practice than anything. If those 100-120 lb. former stewardesses can ride and balance a Harley and make it look easy as pie, than anyone should be able to.
Jeff