This article seems a little alarmist. I have seen sites where if you want to post a comment, or reply to a comment it will say "log in with your facebook account? Log in with your google account? Or Log in with your (site) account." If I feel really strongly about my comment, I will make an account at the site to post my thoughts, but I never choose the google/FB thing because I don't want this site to know my FB or G+ .
That being said, I absolutely love the G+ interface, the ideas behind it, and it seems that there is far better discourse on that site. I wish that I could bring my friends over from FB, because I feel that G+ is so much better.

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