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?
Published today were Why Paying Attention To The Fold Is Stupid by Jeff Olson and Scrolling and Attention by Jakob Nielsen. Not surprisingly, the articles seem to be at odds with each other.
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!")