Play_Bach - 8:06 am on Oct 14, 2012 (gmt 0)
An EMD can only be an exact match for one term. Either you were caught in one of the other concurrent updates or the EMD algo also catches some PMDs, though I've always found Matt Cutts to be pretty precise in his choice of words.
Thanks Jim. Yes, you're right. I'm confusing things. Whatever is going on, Google cut my traffic by about 2/3 from where it was before September 29. I'm not sure why my site was hit, but it most definitely was. For now, I've decided not to change a damn thing and see what happens.
Regardless of what Google thinks, my site is the unquestioned leader in its niche, and so changing it in any way just to appease some algo I don't understand seems foolish. Hopefully, things will improve with Google, but I'm also not naive enough to count on that. If there's any good news here, it's that I finally know first hand that what Google giveth it can take away. Diversify your traffic sources and plan on Google not being part of it. Hedge your bets folks.