[peloton]

Looked up the latest Janrain report. Looks like the trend reversed and Facebook increased their share:

"Facebook is regaining ground lost in Q4 2014, with noteworthy growth in the Consumer Brand (9% increase) and B2B (11% increase) verticals

Google+ saw an overall decrease of 6% from last quarter, widening the gap with Facebook to 8% with a total share of 37%"

http://janrain.com/blog/social-login-trends-across-the-web-q...