WebPixie - 1:54 pm on Oct 5, 2012 (gmt 0)
@BeeDeeDubbleU: This is probably true but from what we are reading in here it was not only low quality sites that were shot down.
Based on my own sites that experienced huge drops and some others that I follow it appears that the sites I would consider quality sites that lost big time with this update all have link profiles that could trigger the angry Penguin.
I have seen some EMDs with clean link profiles lose rankings, but not on a grand scale. The EMDs getting nuked in this update seem to be experiencing the exact same situation as the sites hit by Penquin previously.
So I think there were at least two major elements of this EMD update. A lessening or removal of any bonus having an EMD gave sites. Secondly, and more catastrophically for the effected webmasters, a lessening or removal of protection for EMDs from Penquin.
Obviously EMDs are particularly vulnerable to over-optimization of link text due to the site name being the targeted keywords.