The buzz about Back Link Update is getting public attention, as reported. A WebmasterWorld thread reports that back links are being updated at some of Google's data centers. Google has strongly asserted that even if WebmasterWorld has named the update as Pluto, SERPs are not changing. According to GoogleGuy:
I agree this one isn't anything to write home about. Like Pluto, I think this would be a shrinking update; the SERPs aren't really changing. 
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