Compare that graph to Google, though: http://www.quantcast.com/google.com http://www.quantcast.com/google.com Even YouTube shows a similar curve: http://www.

Compare that graph to Google, though: http://www.quantcast.com/google.com http://www.quantcast.com/google.com Even YouTube shows a similar curve: http://www.quantcast.com/youtube.com http://www.quantcast.com/youtube.com I suspect this is a reflection of Quantcast's measurements, rather than something specific to Facebook. More "top sites" data from Quant: http://www.quantcast.com/top-sites-1 http://www.quantcast.com/top-sites-1