bluntforce - 3:58 am on Apr 15, 2011 (gmt 0)
prnewswire might be affected by different factors, such as the duplicate content previously noted.
blogcritics.org seems to have a large number of links from technorati.com
cinemablend.com seems to have a large number of links from MTV movies and wikipedia
digitaltrends.com seems to have a large number of links from techmeme.com
Some devaluation of those inbounds could create issues with the individual sites being able to support large numbers of their internal pages, shallow or not so shallow.
Just a thought, I didn't look through the whole list so it's possible it won't hold true for all.