Search engines give increasingly different results

From Searchenginewatch.com[*1] :

Searchers relying on a single search engine are missing a vast swath of web content that they could easily find simply by trying their qSearch engines give increasingly different resultsueries on other engines. And marketers targeting a single search engine in their optimization efforts are effectively abandoning a potentially huge amount of traffic from other sources.

This supports using search engine aggregators like Dogpile[*2] rather than concentrating on one engine, even if it’s Google[*3] .