Hitwise: Facebook Accounts For 1 In 4 Page Views In The U.S.: "Hitwise has released another staggering data point in favor of Facebook’s domination today. According to Hitwise’s data, 1 in 4 page views in the US took place on Facebook.com as of last week.
In March, Hitwise reported that Facebook overcame Google to become the largest website in the U.S. with 7.07% of all U.S. visits. Google was second at 7.03% at the time. As of September, comScore reported that Facebook was behind Google, Yahoo and Microsoft."