According to this Chitika post, traffic to Google+ spiked following its public launch Sept. 20, but has since plummeted.
Chitika, a data analytics company, tracked Google+ traffic before and after the social networking service opened to all users. “It would appear that although high levels of publicity were able to draw new traffic to Google+, few of them saw reason to stay.”
Are you on Google+? Why do you think the social network has failed to take off?