As I've always said when reading things like this, inexperience is the killer. Now inexperience might lead to them driving too fast for the conditions or their car, but it's still the root cause of the accident. I'm always baffled by the ones I see where six people had been crammed into a Corsa - who in their right mind would try to carry more people than they have seatbelts for?
I almost feel we need to make the driving test like a PPL, where you build up flying hours with an instructor to prove competence in different areas rather than a specific test period. It'd cost more, but it would ensure that people notch up the hours and keep an eye on attitudes.