> that implies it's inferior technology. Search engines learn a lot from their users. Think of spelling corrections, part of them are learned from users that t

> that implies it's inferior technology. Search engines learn a lot from their users. Think of spelling corrections, part of them are learned from users that typed both the mispelled and correct query in the same session. Like in this case, many times better results don't come from better technology, but from a bigger userbase that gives more data to learn from. Google has almost an order of magnitude more users than Bing, hence an enormous amount of data to learn from. IMHO what Bing is doing is a way to tap a (biased, incomplete) part of that data (that also Google has, in their clicklogs) to use it as a signal for crawling and ranking.