goodroi - 7:53 pm on Sep 7, 2012 (gmt 0)
These basic ideas have been announced and confirmed by Google before:
Google launches "above the fold" algo update that looks at page layout & ad space
Google announces update to go after MFAs using copied content aka Panda
Google can be using these quality checkers to manually apply penalties or help research the automated updates or maybe just double checking the accuracy of the updates. Either way webmasters should remind themselves everyday what Google's idea of a good webpage is.