[Siri]

It's not luck; it's practice. There are actually [at least] two main methods, one faster than HPs typically go and one slower. Neither involves violating G5, G6 or any other rules. There's no visible delay in overall throughput between them, though in reality there probably is some incremental difference. Personally I find the slower approach easier and more consistent--actually, I had trouble making totes land on end that way--but I know people who can do the faster approach all day long.

Actually, on looking at the 548 video, I'm not sure he's doing either approach I mentioned. (Though he may be; it's hard to tell.) So maybe there's more than two approaches.