Phil Bradley's Blog
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Wednesday, August 03, 2005
The summary you link to leaves out an important word from the article it links to: top results.Post a Comment
It's fair to assume that a huge amount of apparent non-overlap comes from different "relevance" algorithms.
As I'm sure you know, there's no way the researchers could have analyzed all results for most searches, since Google and most other web search engines won't return more than 1,000 (or fewer) results for any search.
I haven't gone to the actual research report to see what they mean by "top" (first 25? first 100?), but...