I'm glad you were wearing a helmet Jimbo. I don't think there is an argument to make against the safety advantages of helmets.
But I never wear one..... I grew up in the Netherlands, riding my bike to school every day. When I was 25 I rode my bike around the world. At that time the only people wearing helmets were American bike-tourists. I have crashed my bike, but never got seriously hurt. I consider not wearing a helmet as a chance I am taking, just like taking a chance by going riding in the first place, or getting out of bed in the morning.
But you just proved again that helmets do save lives.