Last Friday Google Update Exact Match Domains (EMD)...
Last Week Matt Cutts Two Tweets on Twitter...
First
"Minor weather report: small upcoming Google algo change will reduce low-quality "exact-match" domains in search results." On 29Sep2012
Secound
"New exact-match domain (EMD) algo affects 0.6% of English-US queries to a noticeable degree. Unrelated to Panda/Penguin." On 29Sep2012
Last Week Matt Cutts Two Tweets on Twitter...
First
"Minor weather report: small upcoming Google algo change will reduce low-quality "exact-match" domains in search results." On 29Sep2012
Secound
"New exact-match domain (EMD) algo affects 0.6% of English-US queries to a noticeable degree. Unrelated to Panda/Penguin." On 29Sep2012
First, some examples as provided in the thread:
(1) Short tail keyword of [carpet]: www.carpet.org ranks above a Wikipedia result. 
