Unless you know something I don't, there has been zero research into this topic, and anything you read on blogs is a wild guess.
Please prove me wrong by citing some research. I just did a search (terms: "polyphasic", "sleep", "sleep architecture", "REM", "SWS"), that didn't turn up anything.
According to that article, this guy is "founder, director and sole proprietor of the Chronobiology Research Institute which he runs from his home". Forgive me, but my quack-o-meter just redlined.
Can you point me to something that has been peer reviewed?