The linking strategies he employs could be used by any website. I think one could use these strategies to start any number of websites.
Edit: last sentence didn't make sense so I fixed it.
This sort of thing would be suicide for a site you actually care about. As a startup, having your website de-listed by Google is pretty much guaranteed to kill you.
But yeah, linking from bad neighborhoods is pretty much the best way to get removed from Google's index. Blog hosts that allow spam are considered bad neighborhoods.
If I were to do this I'd measure the risk/reward of trying to speed up the growth rates, but everything he did previously is probably good enough.
But doesn't Google know who the owner of each AdSense site is? Eventually, they have to send him a check, after all. And if someone owns a lot of these AdSense sites, doesn't this raise any flags?