DerNebel on 15 October 2013
I found this article regarding the "Bing is winning the challenge 71% to 29%"
http://www.huffingtonpost.com/2013/10/07/bing-it-on-yale-ian-ayres_n_4058435.html
No prove or anything, but a little thing to keep in mind. Just take those numbers with a grain of salt...