I found this fascinating quote today:

Michael Kordahi, (@delic8genius ) created a simple search site that delivers the unbranded results from Google, Yahoo and Bing.  You can find it at http://blindsearch.fejus.com Search for “MD Suburbs ” and you’ll find 3 very different results.  Click on the Vote button and the three search engines will be revealed.  For each search the columns are switched.  Having a little fun, I searched for “Decision Engine” and “Why Bing?” just to see how skewed I could make it.

Bing, Google or Yahoo?

You should read the whole article!