A few weeks ago I found this interesting article on auto insurance policies for men and women: http://articles.moneycentral.msn.com/Insurance/InsureYourCar/worse-drivers-males-or-females.aspx.
Insurance companies are known to be profit driven. If they make a discount to some insured people group, usually they have their good reasons.
In this article a few statistics are shown about traffic violations, car crashes, and D.U.I. for women and for men. From those statistics women seem to be less reckless drivers than men.
Somebody could object that you can show anything with a few statsitics, as long as your statistical sample is biased, your calculations are biased and so on. However, the article also shows that the majority of insurance companies in the USA have different policies for men and women... and usually the car insurance policies for women are cheaper.
This should indirectly confirm the statistics, based on the assumption that insurance companies are profit driven.
However, at least some of those gender differences seem to be due to life style. For example, the percent of D.U.I. cases has grown for women from 1998 to 2007 and ddecreased for men in the same time span.