Alex Yumashev from Jitbit wrote a blog post named Google Search is only 18% Search. He basically is saying that only 18% of the search page, the part you can see on a normal screen resolution, is search related. Google’s head of search spam responded on Hacker News saying that is not the case.
He provided this screen shot which I overlaid with other images he provided:
Truth is, the best way to say it is that only 18% of the search, is to say only 18% of the screen real estate is made up of organic results when there are ads displayed.
Matt Cutts responded saying:
I am sure some readers here will have a field day with this but the truth is, the number of organic results shown today versus several years ago, even on smaller resolutions, is less. How much less is a statisticians playground.
Forum discussion at Hacker News.