From all the info I have been able to collect and from the results of analyzing the websites I manage, these are the observations I have noted.
I have seen no impact on the sites I care for as of yet, but my niche is "Small Business Websites".
I think, but this is just my own opinion, that it's sort of like a refresh of the "Freshness Update". Like how Penguin would be refreshed every so often.
Now it occurs to me that they have decided to incorporate this just as how they have incorporated Penguin to run real time.
Anyone here running sites that are heavy into social media? It would be interesting to find out if those sites have been impacted.