Were the Muppets the Reason Behind the Growth of Google+?

Last December, Google+ added 12 million new users to its social network.
According to the latest statistics, Google+ currently has 62 million registered users. What caused the sudden swell in the number of users? It is maybe the step up in Google+ marketing schemes which includes a holiday ad featuring the Muppets.
The projected number of users by the end of 2012 is 293 million but experts said that the activation of its Android version will likely contribute to the growth as well.
Allen, who founded Ancestry.com, also noted that Google+ users seem to be more active sharers, on average, than their Facebook peers. He said the average Google+ user uploads five times more photos per day than the average Facebook user.
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