maxmoritz - 6:25 pm on Feb 28, 2011 (gmt 0)
I've looked at my site as well as others for which I have stats. Every page on an affected site moved down, but some moved down a little, and some moved down a lot. For example, moving from #4 to #12 while another page moved from #5 to #49.
There are pages that dropped eight spots that seem to be as strong as the pages that dropped 44 spots. There's other factors that play into the difference in the levels of drop, though. I'm seeing some of those factors, but I need to dig deeper to find more.
I've had exactly the same thing happen with my site. I agree with you here, but I still think it's a case of sites being devalued as a whole (to a different degree with different pages, sure) rather than the algo being changed and one site being hit across the board by chance.
Yeah, now that I read what you're saying correctly ... Could be a 'near duplication and origination of information' type of assessment ... EG There are already 10 of these we have which seem to be published first, so we'll discount the rest that have a high degree of similarity.
Interesting. If that was the case a test to get out of the hole could be re-writing content in an attempt to be substantially different. When content is similar perhaps link authority could be the deciding factor.
However, I don't see why the massive page drops would have occurred, where quality sites have ended up far below many sites of much lessor quality...by every metric.