Time out

Stats from the US say Facebook has now overtaken Yahoo in terms of number of unique visitors per month, at 133.6 million - a million and a half ahead of Yahoo.

But the story (for US advertisers) starts a year ago, when Facebook edged ahead of both Google and Yahoo in terms of monthly "attention" (time spent on Facebook.com as a percentage of all time spent online each month). In the graph below, Facebook is the blue line. All from Compete.