romerome - 6:22 am on Sep 30, 2012 (gmt 0)
3.9.2 was back on Sept 19th. That is not what I am seeing in the serps. I am seeing sudden changes in the last few days for serps I watch. All EMD's have not been hit. This is a really rough guess but I would think maybe 50% or so got hit.
I am seeing the EMD rollout outside of the US.