After much debate and discussions, Ben Fisher claims he has solid proof of noFollow helping in his website's ranking.
In the experiment, he wrote a review on the SpiderMan 3 game and mentioned it in various blogs which he linked back to the review site. What happened then was, his site was ranked number 1. Also, "piderMan 3" used as an anchor text contained a noFollow.
Reaction to the experiment has been varying with one user saying "This is interesting info" while another said "If Google knows "piderman 3" equals "spiderman 3" then it knows that pages containing "spiderman 3" are also relevant for query "piderman 3". This experiment isn't a good proof (although I think Google counts nofollow links). Ben Fisher says, his site does not mention piderman in the text nor in the code either.