Facebook was the #1 destination on the web in December 2012, with a 10.8% share of time spent online, according to a new ComScore white paper. Google sites may command the largest audience (191.4 million people in the UA), but Facebook continues to demand the most attention.

Google properties collectively grab 10% of time online. But Facebook accounted for 83% of time spent on social sites. [AlLindstrom]