I wonder which product is really driving G+ adoption. If Google+ is opted in by default on Android now* that would account for almost all of the growth in G+.
* I think this is the case with ICS, less sure if it's the case for the Gingerbread phones that form the vast majority of Android devices sold.
* I think this is the case with ICS, less sure if it's the case for the Gingerbread phones that form the vast majority of Android devices sold.