Mr_Prospector - 9:59 pm on Jan 23, 2012 (gmt 0)
Most of my sites got crushed on Oct. 14th. The sites that have maintained their ranking have one common thing going for them. Links from High quality, older, trusted sites and that's it.
I've tried updating content and adding social media to the affected sites with more adverse effects on those sites. So to me it appears as if google has turned up the quality score for incoming links.