These are pirate movie websites as apposed to your YouTubes and Metacafes. So all of the content on these websites are illegal - which is great link bait for a seventeen year old locked away in his bedroom watching illegal material! But I guess Google doesn't really publicize that type of link bait.
One thing i've noticed early on in this study is the percentage breakdown against the keyword within the anchor text as opposed to the brand being included. One domain has around 200 links with ALL the same anchor text and this domain only ranks for this term. Most of the other test subjects are above 95% keyword specific rather than brand - but then again as all of these domains contain the keyword term, it isn't won't make much of a difference.
Some of these domains have only been registered in the past year (with one at the start of June!), so I doubt there is enough time to build up a respectable brand name. I can send you some date over PM if you like (regarding the rise of these URLs)?