Here’s a chart that compares the speed of adoption of the new big 3: Facebook, Twitter, and Google Plus (G+).
There are things to like about G+, but it’s way too early to predict is will be a Twitter-killer, or a Facebook-killer. For me, it’s currently getting populated by the same people who are in my Twitter and Facebook networks, with a few new additions in the mix. The last thing I need is for a third network to splinter the professional conversations that are already splintered between Twitter and Facebook. I might have a different opinion a month or two from now if it truly does become easier to filter messages to and from different groups of people (via G+ Circles), and still communicate with all the right people. Right now it feels like there are 9.9 million experimenters with G+, and .1 million true adopters. (Chart from Gadgetsteria)