I was a better driver the day I turned 16 and got my license (I was there when the doors openned) then what seems like most of the people on the road now.
My driving instructor didn't teach me anything. Not that he couldn't, but he didn't want to. He kind of figured that since my father taught him how to drive a truck (18 wheels), and that he said I knew how to drive, he wasn't going to argue. So, I went around the block with him, did some basic driving test meunuvers, and that was it.
I have had one ticket, and no accidents. The only ticket was when I was 16, for making an illegal left hand turn. I never noticed the sign before, and no one else seems to care (I learned from watching on that deal). So, I just payed the ticket (with money I didn't have, since I paid for everything car related), and went to traffic school.
I still feel that I am not better, and no worse then 8 years ago. I have experience more things now, but I have always survived that odd ball incident without a scratch.
Oh, and my father didn't teach me, I just watched what he did my whole life
Then again, my mother also said I was a responsible kid (which she doesn't say for the other kids in the family), which is why I was allowed to have a car, and go anywhere, anytime I wanted without telling anyone (just call if I wasn't coming home, even on school nights).
So, in other words, it isn't the age.
My wife's driving story is near identical to mine. Except her ticket was bogus, and was tossed by the judge (the town had a reputation for screwing outsiders).