CHART: How Pinterest And Google+ Are Outshining Facebook On Desktop PCs

The crowd of social media sites chasing Facebook have made strides in growing their U.S. user bases over the past year. Pinterest and Google+ are perhaps the biggest revelations. The latest data from comScore from March 2013 puts their unique visitor numbers at 29.5 million and 35.9 million, respectively. For Pinterest, that makes 57.9% year-on-year growth from March 2012. That's 74.1% for Google+ over the same period. The rise of Pinterest has already been well-documented. The website was hit 1...