It’s beautiful, it’s addictive, and now Pinterest is having its glorious hockey stick moment. TechCrunch has attained exclusive data from comScore showing Pinterest just hit 11.7 million unique monthly U.S. visitors, crossing the 10 million mark faster than any other standalone site in history. In fact, users are spending so much time sharing their favorite images that now only Facebook and Tumblr have more social media time on site than Pinterest. Who’s propelling its rise? 18-34 year old upper income women from the American heartland. See the rest of the report on Pinterest on TechCrunch.com.