The recent Google Sales Conference in Arizona apparently had a mentalist there to entertain the employees. Bet there will not be one attending the Engineers Conference, they would not risk exposing the alogorithm to anyone.
The evening's entertainment was a mixture of magic, hypnosis and mind reading. The guy had people from the audience up on stage and was able to get them to do various things... now doesn't that open itself up for all sorts of interpretation.
"When you get back to your office you will give my account a million dollar click fraud credit...."