I've watched Mentzers video, where he and Ray train that Markus guy. its pretty interesting but they only use machines and markus is kinda dorky.
Also his heavy duty writings are interesting... but I think in the end he was kinda bitter and very narrow-minded about other possibilities.
My workouts last 20 minutes and I would call them intense... but if they are heavy duty... who knows
go with what works and forget the fancy names.