purplecape - 2:15 pm on May 17, 2010 (gmt 0)
only considers ads above the fold if they are fully on-screen when the browser window loads
Hmm. So I use a vertical skyscraper, aligned with the top of an article. On some screens, the entire skyscraper doesn't show until you scroll down. So are those ads not "above the fold" under this definition? What happens if they are "above the fold" on some machines but not on others....