Ironically, Google+ achieves what Facebook failed to: Making people share with the public
One of the reasons people praise Google+ for are the alleged better tools to protect your privacy. But think about the following:
What does usually happen when you try to access a stranger's Facebook profile? In most cases, you don't see anything else than the profile photo, some basic information (if shared with the public) and the list of friends. Because most people on Facebook have closed their profiles for non-friends.
Now, compare that with accessing strangers' public Google+ profiles when being logged out of Google+ yourself. I have hardly seen a profile that didn't contain at least some status updates, comment discussions and other shared content, accessible for anybody.
Of course, the reason for that is that Google+ allows for very selective content sharing. You might publish a YouTube video with the sharing option "public", and a provocative statement about politics only with specific circles or people.
And I would be surprised if there won't be a lot of unintentionally sharing with the public on Google+ in the future.