Sorry, but that's not what that means. There are settings that allow people to opt to link their Google Analytics accounts to, say, AdWords or Webmaster Tools, but that's at the website owner level, not at the individual-navigating-the-web level.

There's simply no evidence that increased data sharing across Google involves linking Google Analytics data to individual personal accounts on Google+.

(If anything, the trend at Google is towards less integration between GA and Google Accounts; for example, Google now prevents Google search terms for logged-in Google Accounts users from getting passed in the referrer for search traffic.)