turbocharged - 1:32 am on May 18, 2013 (gmt 0)
turbocharged, there's no reason to confirm whether the site has been hit by Panda or not, it's stated in the opening post that it was hit by the EMD update.
First came Panda, then Penguin then the EMD updates. Collectively, the EMD update has two sets of signals to draw from. Having an EMD on its own does not result in a penalty in itself. Those hit by the EMD update were likely near the threshold of Panda or Penguin and the EMD update was the straw that broke the camels back (the last signal of keyword targeting Google needed to demote the site). If that's the case, then it is relatively easy to fix because the negative signals are not that strong to warrant an extreme amount of effort to fix. Simply lowering keyword density on some sites is all it takes to recover from the EMD update. Going back to my original post, it is important for the OP to look for any Panda related drops in traffic - even if it was slight. Piecing the parts of the puzzle together will make it far easier for the OP to assess and correct.