No, it's the rules of physics. Have you read the third article I linked to - it probably has the best explanation. Just ignore the fact it was written nearly 20 years ago, the concept still stands.
So every test from NZ -> US over 50Mbit is "fake" ?
So every test from Japan -> US over 50Mbit is "fake"?
You realise of course, that if "physics" is the limitation, being "the speed of light can only move so far in a certain amount of time", then "light can orbit the circumference of the earth in only 133ms" suggests that its not such a big deal.
But you don't know who did the test, and where from that got that speed. It may well be a techo at an ISP running it from a server on their core network that is going to (in terms of latency) be far closer to the test server than any real world customer will ever be. You see the odd speed test image jump up with people showing gigabit speeds from a speedtest server - these are generally from someone who works at an ISP that actually hosts the speedtest server on their network. Basically, ignore the very extreme test results that are out there - they are artificial, not real world.
Actually, I do , I have message transcripts from the person doing the tests to the test server, and the test server has no servers in nz or australia
I don't know exactly where they're doing it from in NZ, they could have some very plushy deal with some very edge network, but they are most definitely getting these speeds from NZ.