Interesting new data about searcher behavior from a recent User Centric eye-tracking study: Whether using Google or Bing, all 24 participants looked at the organic search results for their queries, but between 70% and 80% ignored the paid ads on the right side of the page. User Centric studied the search behavior of 24

Source: Eye-Tracking Study: Everybody Looks At Organic Listings, But Most Ignore Paid Ads On Right