Which is becoming more and more obvious.
However, it was sold to its users as a social networking service.
Most people are going to wonder what google plus is, and end up here, where Google is actively telling potential users a particular story:
https://plus.google.com/up/start/?continue=https://plus.goog...
Nowhere in there does it say it's an identity service. The closest it comes is to talk about putting different people in different circles.
Nowhere does it say that services that worked perfectly well for you are at risk if you run afoul of the name issue.
Which is becoming more and more obvious.
However, it was sold to its users as a social networking service.