I don't know. I learned on an intensive course back in 2006 when I was in the army. 2 days after getting in for the first time I'd passed my test. I think the military will need an exemption from this because for a lot of trades in the military, learning to drive is part of their training! I was 17 when I learned.
Other than that, I don't see the problem with it at all. But in my experience it's about what people are being taught and how well it is taught. One of the young lads I was working with in Bedwas was learning to drive, giving it big licks and quoting the words of his "instructor" as gospel. Thing is, he was being taught that coasting in neutral down a hill is a good thing! That was just the start of it!
Being taught poorly to pass a test is still teaching someone poorly to pass a test whether they be learning for a day or a year.
Lets not forget btw, that you don't need to be young to be an idiotic accident magnet. The crash where I lost my stilo MW (*sniff*) was due to the other driver, a 48 year old driving around in the evening with no lights on. I think we need to have re-tests or assessments every now and then to keep us sharp. A pain in the back-end no doubt, but what would a regular mandatory retest do the accident figures? Perhaps that might reduce the accident rate?