A great write up of how Google caught Bing! cheating. I am a bit late on this, but it is still humorous.
Amit Singhal for Google:
We created about 100 “synthetic queries”—queries that you would never expect a user to type, such as [hiybbprqag]. As a one-time experiment, for each synthetic query we inserted as Google’s top result a unique (real) webpage which had nothing to do with the query.
We gave 20 of our engineers laptops with a fresh install of Microsoft Windows running Internet Explorer 8 with Bing Toolbar installed. As part of the install process, we opted in to the “Suggested Sites” feature of IE8, and we accepted the default options for the Bing Toolbar. We asked these engineers to enter the synthetic queries into the search box on the Google home page, and click on the results, i.e., the results we inserted. We were surprised that within a couple weeks of starting this experiment, our inserted results started appearing in Bing.