RedCardinal - 5:04 am on Oct 16, 2012 (gmt 0)
Again, lets' try to keep the different updates separate (as impossible as that may be). An exact match domain can only be an exact match domain for one search term.
How can we be sure? FWIW I'm pretty sure we have no idea how the EMD update affected websites apart from an obvious drop for the EM keyword. Multiple simultaneous updates obfuscates things quite nicely for Google.
My own suspicion is that EMD update actually affected domains beyond their EM keyword. In fact I think there's a chance this was an over-optimisation algo which specifically targeted EMDs.