---- Matt Cutts: Google Algo Change Targets Dupe Content
tedster - 5:50 pm on Jan 28, 2011 (gmt 0)
Here's some more precise information from Matt's blog:
This was a pretty targeted launch: slightly over 2% of queries change in some way, but less than half a percent of search results change enough that someone might really notice. The net effect is that searchers are more likely to see the sites that wrote the original content rather than a site that scraped or copied the original site's content.