That's interesting, but riving them with a shingle axe looks faster to me. At least the guys I've seen do it. And there's no wasted material, or very little at least, compared to a saw kerf.
I had to stop when it got to the guy casually smoking a cigarette and manipulating logs while not looking as they came out of the 2-foot-diameter spinning blade of death.
There's a video somewhere that's even worse, where the guy is also doing the 2 foot diameter blade by hand as well instead of it being autofed.
I rather like this video. I aspire to chop so well.