New report from ComScore states Google+ users averaged only three minutes on the site during January, a pittance compared to Facebook’s average of 405 minutes per visitor. Tumblr and Pinterest both saw 89 minutes per user on average, while LinkedIn clocked in at 17 minutes per user and Twitter at 21 minutes.
As for that three minute stat, I am totally guilty. not quite there for me yet...not sure why. It will be, one day. http://marketingland.com/google-users-spend-3-minutes-per-month-there-6960