I think everyone can tell he's talking shit.
His vision of SEO stops at the Google web master guide lines. He's the white knight of the SEO world, trying to spread that black hats are dog rapists or something and the only way to live is by the guidelines google gives you. I think everyone, including him knows that this is horse shit.
To say blackhat does not work is saying Googles algorithm is perfect, and that's just not fucking possible and it will never be. There will always be loop holes to exploit. It was blog comments in 2011, then web 2.0's, PBN's, now high authority posts are becoming more and more common... How the fuck can google fight a paid link from huffington post? Are they really going to de-index the whole domain, what about NY times, inc.com, forbes, buzzfeed, MOZ.... all these big sites are now getting easier and easier to post on. You can sign up yourself as a writer or pay someone like t0mmy and others to do that shit for you with no messing around.