Over 10M people have joined Google+
Great achievement for the team
There’s also a ton of activity
We are seeing over 1 billion items shared and received in a single day
Our +1 button is already all over the web
It’s being served 2.3 billion times a day"
Source: Larry Page, writing on his Google+ page, 14th July 2011
Note - The field trial of Google+ started on 29th June 2011