Facebook was the most visited Web site in the U.S. during the week ending March 13, surpassing Google for an entire week for the first time, online metrics firm Hitwise said.
Facebook had previously been able to attract more visitors than Google on Christmas and New Year's Day, as well as the weekend of March 6, said Heather Dougherty, director of research at Hitwise, in a blog post.
Facebook's market share of visits is up from 185 ...