I'd reckon mostly Hawaiian including the sprint stuff.
If you watch the Tahitian OC6 teams (where it comes from) also it is a way higher rating and also just concentrating on a strong catch with lots of reach and getting the paddle out way before the hip. Given they win everything it obviously works for them. To me it looks like they only use the untwist from the reach and then back out again.
Dave looks like he is getting the paddle out early way before the feet and back to the catch again. He describes it more like paddling at 70.70.70 rather than 90....90....90 and he also says that its faster and much more efficient over distance with the lower effort required to maintain speed.
It's what his whole 50/50 thing was about. read about it here:
www.davidkalama.com/2011/03/kalamas-5050/