Google+

[gibborim]

Though I don't have a g+ account myself, I've heard that it's REALLY beginning to take off, it acquired 10million users in a fraction of the time that it took facebook.

Apples and oranges. Realistically, a very large number of people are going to sign up for Google+ simply because it is Google and a thing they are pushing. Comparing the population curves for Facebook and Google+ is a bit silly if not outright disingenuous.