An A/B test I want to see is Jakob Nielsen's latest article http://bit.ly/bkobHl published on a hip designer blog. I bet everyone would have wet themselves.
Uh. Who's Right?
Nielsen's article is based on eye-tracking (which some pundits have derided - "1997 called and wants Jakob Nielsen's 'new' article on The Fold back. Now with eyetracking data!")