I say most blow up even with 2%.
This is probably true simply because of the lack of any meaningful strategy and lack of discipline.
But certainly restricting risk to 2%, or even 1% (of current balance is best in my view) loads the dice in your favour, if 1% restricts your trading in some markets, maybe Forex can help, or if in the UK spreadbetting with the likes of IG index at 10p per point?
Having said that, any new trader that does not take the time to understand what he/she is trying to trade would be better off not taking any risk and investing time in education.
(Just my view) But I do speak from experience of near as damn it blowing my first efforts at trading - down 80% in 6 months, and recovered to -20% in this last two months. Now trading Forex live after taking several months out to learn, practice and now execute!
Graeme