"Best guitarist" polls are stupid. But that guy from Radiohead just plain sucks. Sure he may be very experimental, but that doesn't take away from his suckage. I could be experimental and try to make ice cream that tastes like rotten eggs and steak, or bang on my guitars with a hammer, but it would still suck. And no, I don't listen to "nu-metal" (or anything else on the radio/tv for that matter).
Radiohead is either:
(A. A cure for insomnia
(B. aimless "experimental" noise
or (C. A close cousin of the sound a chalkboard makes when someone scratches it