I don't see any changes that are specific to EMD in the USA. These EMD domains are moving around along with branded domains, which leads me to believe that some other factor is causing the minor movements.
Despite many EMD that were hammered in the past, EMD that bring good value to visitors have held up really well. But I think the whole EMD concept is a factor considered by Panda, which means the other signals that Panda looks at had better be beneath the threshold to trigger a demotion.
This would be welcomed news. For the most part, I've given up on my EMDs, even though they have decent content. Does anyone disagree when I suggest that Google actually threw an anchor onto your EMD site? As in, it wasn't even break-even. It was if it was a detriment that was used against the site. I know we can debate that truly wonderful EMD sites rose above this tar and feathering, but I feel it's nonsense. I'm sure it sounds good to say that all EMD's with great content could still rank. That is a fallacy I'm not falling for, but go ahead and believe it. I have better things to do that chase EMDs at this point. Watching paint dry to me is more productive.
So, there is a false positive here about a change of hope with EMDs? I haven't bothered checking my stats for a year or years.
I have some emds with little or no content that are doing very well right now. It doesnt make any sense how sites with only 5 pages containing nothing but iframes can do so good. This has been going on for a couple of months now. No major changes in the serps, just these sites jumped up. Go figure. Actually, it is probably a waste of time to try to figure it out.