Maybe I misunderstand his point, but isn't transferring data from Australia to the US or reverse always going to be slower due to the speed of light? What he's said doesn't negate the fact that he's only got one POP.
Speed of light affects latency, not throughput. TCP works bad with large delays, that's why it's recommended to use several TCP connections to saturate the link.
Yeah, I can never remember how TCP window size + latency affects transfer speed but you're right.
I'm not sure how many POPs they have so I do agree with that. I'm not shilling for B2 and have no affiliation with them. I've had good performance them but am US based.
My individual connections to B2 are slow (200-500 KB/s) coming from Europe but that's why the multi-threaded option makes B2 very usable.