Google+ Off to a Fast Start with 20 Million Visitors in 21 Days (comScore Voices) | Google + Project | Scoop.it
Google’s new social product Google+ launched to great fanfare a few weeks ago, and since then many have been speculating about how quickly the site has grown and whether or not it’s the fastest growing site in history. It’s fair to say the initial market response has been very positive overall, with accolades going to its design, usability and approach to group networking with Circles.

To get a better understanding of how Google+ is performing to date and who is using it, comScore pulled together some figures based on the first 21 days of its public existence (June 29, 2011 – July 19, 2011). Importantly, these data are based on unique visitors (which is different than “users” in that people who never sign up may visit Google+ pages) from home and work computers (which excludes usage via mobile devices). In addition, comScore is measuring behavior from people who visit plus.google.com pages, which may not include usage that occurs through the Google+ bar at the top of most Google pages.