Personally, I don't think it matters what age or how long you have a L plate or P plate for. Just because there are 2 years on a L plate and 1 on a P, doesn't make any person a good and competent driver.
I believe that every learner driver, on top of their basic training, should HAVE to do a minimum 2 day advanced driver training course before they can progress onto the P's. And when going for the Open licence have to do a follow up 1 day advanced driver course. Testing to be extremly tough, with any shortcomings addressed and re-tested.
But wait I hear all the pollies crying "It costs to much!". Pft, yeah right.
Halve the spending on "speed kills" advertising and put that money towards better driver training. Teach new drivers why they shouldn't speed. It may cost more but if you can afford to own and operate a vehicle or even the fuel to borrow a family members car, surely you can pay to learn to drive it.
I used to speed around like a dickhead until I did one of these courses. What a eye opener! I couldn't believe how easy it was to lose it and how hard it was to save it, without prior knowledge. One thing especially that still sticks in my mind even today, was a simple thing the instructor said about people speeding, dodging traffic and concerned that by letting people pass you will never get there.
"On a 1 hour trip to the coast if even 60 cars pass you on the highway, you will only lose 2 minutes of your total travel time."
I wish I had done the driver training when I was younger, I still scatch my head and wonder how I didn't kill myself or some poor other bugger.
Here endith my rant.