“Different Engines, Different Results: A Research Study by Dogpile.com” was conducted by researchers from Pennsylvania State University and Queensland University of Technology. The research conducted in April 2007 measured the overlap of first page search results from the four engines and found that only 0.6 percent of 776,435 first-page search results were the same across all four.
Searchers, I think will tend to use their favorite, based upon which one delivers them the results they like. For marketers, it opens up the whole “which search engine do I optimize for?” question, all over again.
The answer is don’t optimize for any search engine: optimize for humans and expect that you will come up well for different things in different places. That, I actually see as good news, spreading out your sources of traffic and mitigating your reliance on any one in particular.
Less Than 1% of Results Overlap in Major Search Engine Queries
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Sponzurz
