gotmetoo - 1:39 pm on Mar 3, 2011 (gmt 0)
It does make me wonder if Adsense placement isn't at least part of the scoring.
Part, for sure, but only a part.
AdSense is not only the part of the scoring it is the trigger.
This update seems to be directed at web sites running AdSense in general, as Google's definition of a "content farm" seems to be "a) a site with AdSense; b) any other variable", however odd this might sound.