No one study should be seen as definitive, but it’s interesting nevertheless to see this study from French Professor Jean Veronis and his students, which shows a tie between Google and Yahoo in terms of relevance. What’s even more interesting: the study found that *all* the engines failed, for the most part. From the post:
Google and Yahoo tied for first place, with a rating of 2.3, but the most striking result is undoubtedly the extremely low level of user satisfaction. None of the search engines even passed (2.5 out of 5) and some of the grades were extremely low…