That's interesting, is it possible that's only relevant to a portion of the fleet (specifically, the A350-900s)?

I don't know the tech, but I can pretty confidently say some subset of the A350-900 fleet (the early deliveries, which were also the first CX birds with Wifi) has godawful internet speeds which line up with the above. It really is a joke.

But the 77Ws and many of the A330s consistently have speeds that are higher than that graph. I haven't flown enough of Cx's A350-1000s to say conclusively but I think maybe they are faster too.

Hopefully someone here knows more technical details.

But I'd get a lot of money a bunch of CXs A350-900s have some of the worst Wifi speeds out there. It's pretty abysmal.