There are many demographics which include more irresponsible single women.
Do the single women's coverage include coverage for children, for example?
Whose auto insurance has coverage for children?
And the article states, as long has been documented, that women have safer records.
I don’t imagine women drive more miles than men, but I do wonder whether this is controlled for age. In FL especially, lots of old folks who skew very much toward the female.
Otherwise, I’d go back to the wildly different quotes that companies offer—and whether men do more shopping around or have more college, union or employer discounts, etc.