In reply to Tim: Whilst a bolt on hold is not a good thing and should never really happen, I think in this case it was well accepted, cos a) Leo had more than proven himself in the Valley, and if he said it was impossible, then it was, b) it was a wierd and wonderfull way of overcoming the problem.
Now don't you all start saying why should he be able to do it and not mortals trying E2's...cos I can't answer that, it just seems that in this case it was a flash of brilliance that opened a mega pitch, albeit on a route that is not yet completed!