zerillos - 6:09 pm on Feb 27, 2011 (gmt 0)
Here are some of my observations
The only pages that got hit in my case are the ones with external links. I have a subdomain with content that hasn't been updated since 2006 and doesn't have any external links and these pages are fine.
Scrapers rank higher than me on every new article. Some of them have my article in their description tag an no actual content on their page. Just adsense.
At least 50% of all searches in my field are dominated by 2 sites. One is a scraper and one fits the content farm description.
The first positions in SERPs are dominated by keyword stuffers. They have keywords on a title tags, on img title and alt tags, h1 title tags, simply anywhere they can put a keyword they did.
From where i'm sitting it looks like a penalty for having inbound external links.