Drilling down by region, Google+ has seen more than 6 million users in the U.S. and 3.6 million in India, said Reuters, commenting on the data. Canada and the U.K. have each lured in around 1 million users, while Germany has drawn in more than 920,000.
via CNET News.
This is pretty impressive. I already forwarded all traffic from ingovogelmann.com to my Google+ profile.