A PR8 site I consult on lost a little more than 50% of its traffic from Google this week. I don't know if this is part of the Panda update but this site is not a content farm
All original content, doesn't use anybody else's content. No ads, except for their own books and products. Main site hardly links to outside sites, except as footnotes and citations. Has several content products - ranging in words from 1,200 to 25,000+ in depth studies.
They suddenly disappeared in many of their top keywords. They don't even show up anywhere for their experts' names, which they were always at the top. Google crawling has slowed down in March from a high of 30,000 in Feb down to 6,000.
One thing to note is that their experts contribute op-eds and regularly published in WSJ, NYT, Washington Post, Washington Times, etc. Their deal with newspapers is that these publications have the first dib at publishing the op-eds, and they publish the op-eds on their site 24 hours later. Of course, when WSJ for example publishes it, other blogs/aggregators follow suit and by the time this site publishes their own content, it doesn't show up anymore in Google
Their blog, which is a subdomain, doesn't seem affected. It is in top 100 of Technorati politics list.
The site made a massive redesign March 2010 and changed their URLs. Traffic has dropped after the redesign, and a year later still hasn't recovered.
But this week's decrease is different, sudden and massive.
What are the things I need to start looking at?