Maybe there'll be an opportunity to drill down in the data. There's a huge wide spectrum of people who suck at driving (senile old people, oblivious soccer mom, boy-racer, etc) and I would be very surprised if they're all roughly equivalent.
Minor nit: I think your comment would be greatly enhanced if you changed some stereotypes, e.g. "soccer-mom" for "soccer-parent", "senile old" for "old" or "people with less reflexes" and "boy-racer" for just "racer". None of those relate 100% to the gender or age of the driver, IMHO :)
Soccer mom is an accepted phrase with known meaning. "Soccer parent" isn't.