http://searchengineland.com/study-disputes-accuracy-of-bing-it-on-claims-21-prefer-it-to-
A new study appearing on the”Freakonomics” blog aggressively disputes the claim that people prefer Bing to Google and especially the statistical contention that they prefer the search engine over Google 2:1. In an article explaining the study, law and economics professor Ian Ayers argues that the Bing television and related media campaigns based on the Bing It On challenge constitute deceptive advertising.