Bing and Yahoo yield higher "percentage of search queries that result in a visit to a website". I often use google's
built-in calculator, flight status and definition queries. This means I am "finding relevant information" without finding a website. Does it make google less efficient? I do not think so.
Bing also has a built-in calculator, flight status, and definition queries. I'm not sure there's any data that suggests whether or not it is used more or less often from Google or Bing.
This was my first thought too, but I would guess that normal searches make up >95% of searches (averaged over the mostly non-technical population). So I don't think this can explain the discrepancy.
Also, I frequently find the information I'm looking for in the blurb from the website and so don't bother to click through. (Or I view the cached version.)
