Pinterest Hits 10 Million U.S. Monthly Uniques Faster Than Any Standalone Site Ever -comScore
According to comScore, the average Pinterest user spend 98 minutes per month on the site, compared to 2.5 hours on Tumblr, and 7 hours on Facebook. If you don’t count sites like Google+ or new Yahoo channels that have built in user bases, comScore’s data shows Pinterest would be the fastest site of any kind to hit 10 million monthly uniques in the U.S.
Full Story: TechCrunch

