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Yes, Google takes into account Link Popularity (by this I mean, sites which "LINK" to your site).
NO, Google does NOT count number of visitors to your sites in any shape or form.
Shak
(welcome to webmasterworld)
Google occasionally measures clickthrough on its results, kind of like Direct Hit and some other sites do.
Only about .5 percent of its search results are measured, but they don't use these measurements when calculating ranking.
If you are a member to SearchEngineWatch, you can view the article on how Google works [searchenginewatch.com].