"Facebook’s putting up some big numbers in terms of U.S. web traffic. Right now, the site accounts for one out of every four pageviews in the United States — that’s 10% of all Internet visits.
According to data from analysis and intelligence firm Hitwise, Facebook’s year-over-year growth has been phenomenal. We reported in June that the social network was set to eclipse Google in web traffic; now, Hitwise is showing that in the past week, Facebook.com saw 3% more web visits and almost five times more pageviews than Google.com.
By these metrics, Facebook is by far the single most popular website in the United States. Still, other sources with other measurements and criteria show some variance"
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