Mobile Facebook and Twitter Booms, MySpace

Social networking sites are being accessed more and more via mobile browsers, but not all the big dogs have loud barks. While Facebook and Twitter are thriving in the mobile realm, MySpace seems to be foundering.

According to recent figures released by comScore, 30.8 percent of smartphone users in the U.S. accessed social networking sites by way of mobile browsers in January, which reflected an 8.3 percentage-point increase from 22.5 percent in the same month last year.

This figure was drastically lower for feature phones