It depends on the driving course. A good driving course would improve the drivers mindset and habbits rather than driving skill. Driving skill is a by-product of the two things mentioned.
I just hope the authorities tackle the problem at hand rather than just turning it into a vehicle for political gain (excuse the pun) :P
I honestly think 50speed limits are useless. And i'm not saying it just because i like to drive fast. Solving a problem involves more than just outlawing the action that causes the problem but to tackle the root of the problem. I think better education of young drives is the right direction.
Look at smoking for instance, there are far much less young smokers in the last couple of years than there was 10years ago. I am sure part of it has to do with educating the public about its effects. The more you restrict people, the more people will rebel. Dropping the speed limits or putting more speed cameras doesn't solve the problems. It will give people more motivation to find places to drive fast and dangerous. It's a human trait to break free of barriers and regain perceived "freedom" and in this case it will be to drive fast for that adrenelin rush. It's a difficult issue!
With that said, who's coming on the next sydney cruise?