First let me say that I can't nose ride at all. Well I can get within about a foot without too much trouble. After that it is wipe out time. Always been the same for me.
There are a couple of things that I have noticed over the years, some are listed above:-
* The right wave is a big help. Noosa points for example. The type of wave and the way it breaks can have a bearing on your learning curve.
*A dedicated Nose Rider will get you there faster as we all know they are designed to sit in the right spot and stay there when used correctly.
*Size and weight of the rider play a part, but larger guys who are skill full can also get there.
* The biggest factor is practice. If you look at the guys who are regularly getting 5 or 10 they are people who spend a lot of time doing it.
In my opinion, get a dedicated nose rider or a good compromise and practice, practice, practice.
I base my statements on over 45 years of surfing and watching surfers. The likes of Josh Constable, Chris d'Aboitiz, Joel Tudor, etc spend and have spent considerably more time in the water than your average punter. Like any sport the more time you put in the more results you get.
The pity is that average, normal people don't get that time.
ET.