Kufu - 2:25 am on Oct 2, 2012 (gmt 0)
To provide some additional info for people to digest, another one of our sites which is a dog breed (exact match name--single word) has disappeared from the listings, despite the fact that it is the only site dedicated solely to that one breed of dog. The content is original, and well written. It was ranking at #3 or #4 depending on the day, below Wikipedia and the AKC website.
Now it has all but disappeared for the major keywords.
I still am of the opinion that something is not right with this update and that some inexplicable drops will get fixed over time. I say this because we also have a few EMD sites with only a single page of information (some have disappeared while others have kept their rankings); interestingly one of the single-page EMDs which kept its ranking is an seo-related site--the content is good, but still, I would expect such an algorithm update to take out that site, not the dog breed site.