One fallacy that's been mentioned here: Girls are not cheaper to insure than boys. That used to be true in the past, but it was discriminatory, so the insurance companies raised the girls' rates to match that of the boys.
Definitely not true up here in Canada. We just added our 17 year old son to our insurance when he passed his "G2". We have graduated licensing here in Ontario, so there is no additional cost for insurance when a person has their "G1" or learners permit as they cannot drive alone at that stage, but when they achieve their G2 allowing them to drive alone with some minor restrictions, you get hit with the increase.
Taking a ministry approved drivers education course (at a cost to the parents of between $700 and $1200, depending on the coures provider) significantly reduces the overall insurance cost for Canadians as it bumps the initial driver rating from a 5 (the worst classification) to a 3. Even WITH the drivers ed discount, his insurance is $1000 per year as an occasional driver.
As a primary driver, it would have been $3K.
And our broker specifically said to me when I called to make the change to our coverage "now, had he been a GIRL, you would have only been paying half that". Then he went on to quote rates that would have fallen within the $450 - $600 range for females of the same age, just to rub it in. So gender most certainly makes a difference here.
When he passes the final stage in the graduated licensing (to a full "G" license), his premiums will increase yet again

. But his G2 is valid for 5 years, so he can delay that for a while as long as he doesn't mind adhering to 100% abstinance from alcohol consumption (which we have drilled into him anyway) and being restricted on the number of passengers he can have with him in the car between midnight and 5 am.