Nostalgic_Dave - 5:06 am on Oct 16, 2012 (gmt 0)

I noticed that on the 12th, according to Webmaster Tools, all 5 of the sites I have registered with WMT lost impressions, and more again the next day, yet click through (according to WMT) was the about same. One of my sites did bounce back up a notch on the 14th (with even stronger click numbers). Was there any known update that rolled out on the 12th, or did the ATF update take this long to completely roll out? There was for sure a noticeable dip in the traffic graph for all of my sites.