Apparently Bing's press release didn't state what proportion of people found Bing to be better than Google, or even what proportion found it better-or-equal.
If those statistics had been favorable, they would assuredly have been reported.
Look at it this way: how many of the people who visit the page are going to switch away from Bing to Google?
Probably not too many. So even if they just get lucky one in fifty times with a search on which bing does much better, that's a huge net positive for if lots of people try it out.
If those statistics had been favorable, they would assuredly have been reported.
(Note: Bing's blog post http://www.bing.com/community/site_blogs/b/search/archive/20... does mention the 2-to-1 preference claim again, but that's from a previously commissioned study, not from the Bing It On Challenge.)