According to recent stats released by Comscore revealed that Google+ gets 66% more traffic over past 9 months. The unique visits to Google+ touched to 110.7 million international visitors in June. US Traffic also peaked up from  15.2 million to 27.7 million  visitors.
On the Facebook side it has gone from 166 million unique visitors in the U.S. last November to 158 million visitors in May, but growing again in June to 159,8 million visitors.
According to Google’s Vic Gundotra its also confirmed that similar like Facebook, Google+ is also getting most of the traffic from Mobile Devices.
Via: Google+