According to Experian Hitwise, Google+ on the week ending November 12, 2011 received more than 6.8 million total US visits.
"The growth represents a 5% increase versus the previous week and a 25% increase compared to a month ago," said Hitwiser.
"The top two weeks for overall visits to Google+ took place when the service opened up to all users the week ending Sept. 24, 2011 and the week directly after. Traffic also increased 3% overall in terms of total US visits and the average visit time increased 15% in October vs. September 2011," Hitwise said.
Hitwise notes, that Google+ is highly benefiting from other Google properties for referral traffic.
"Among the top ten referral sources, eight are Google properties and accounted for 73% off all upstream traffic last week, up from 65% during the peak week of Sept. 24, 2011," stated Hitwise.
Another positive sign for the site is the share of visits from returning visitors has been increasing over the last few weeks. "The average of the first two weeks of November versus the same time in October shows the share of returning visitors to the Google+ site increased 18%. Last week, 74% of the traffic to Google+ was from returning visitors, suggesting that Google+ users are returning to interact and engage with their networks (aka circles)," said Hitwise.