Well, it's almost the end of the usual week long "algo update cycle" for us. Not a lot of changes for though two EMD sites show opposite changes; one is pulling more short phrases (fewer long-tails) while the other is pulling more long-tails (and fewer short terms). Overall traffic looks to be down about 6% average but Christmas is getting in the way of accuracy. There are others sites in the SERPs with those sites that rose fell or were replaced by other sites.
One of those EMDs took a big hit when the EMD algo/mod was introduced but the other benefited; the one hit is showing recovered numbers again just with different terms. The other EMD I'm holding my breath on because it went to number one at the begining of the month when SERPs appear to have had an update, a week later it was back down. With this most recent update (#23?) it's back at number one and hopfully it'll stick this time.
Personally I think there was an introduction of this update around the second week of December and this is a reintroduction with tweaks. What we saw then is what we see now with the exception of a holiday in the middle.