Matthew Hurst, who works with text mining and social media at Microsoft (he's also the co-creator of BlogPulse) shared an interesting visualization on Google+ on his personal blog (and linked to on Google+).
"I took a sample of the Google Plus graph and loaded it up in to the excellent Gephi graph rendering package," he explains. "Due to the simple manner in which I crawled the data, this doesn't represent a true breadth-first crawl of the graph (rather it captures the random set of in and out links that appear on a user's profile page). However, what is interesting is that there is a clear tightly connected component that is distinguished from a more dilute area. I suspect, without any real investigation, that this is the core area of Google employees and some of their immediate connections as well as alpha users. This is complete conjecture, though."
Here's what it looks like:
"In capturing this data, I also observed the complete in and out degree of each node," he adds. "The top ten that I came across where (in order): Mark Zuckerberg, Vic Gundotra, Robert Scoble, Tom Anderson, Matt Cutts, Markus Persson, Pete Cashmore, Thomas Hawk, Evan Williams and Om Malik with links ranging from 456k to 33k."
He also notes that 48% of users haven't posted yet (at least publicly).
To that note, I'm still wondering how it's going to work when Google+ is no longer invite-only. Will it simply become part of the greater Google experience for everyone else? A share box that just hasn't been used? Will Google be able to count anyone who simply has a Google Profile amount its user count for Google+? In that case, I wonder how big the percentage will be for those who haven't posted anything.
Last week, we looked at report from Experian Hitwise, visualizing adoption of Google+ using a new "Mosaic" segmentation system. “Careful analysis of the Mosaic segments since launch; reveal that in just over six weeks, we’ve moved from innovators to early adopters to early mainstream users visiting the new social network,” said Experian Hitwise's Bill Tancer.
Last week Google launched games for Google+ which should go a long way in drawing more mainstream users. Google also announced the ability to share info from Google Books via Google+, and started including Google+ posts in search results via social search.