This question is fairly naive. The speeds measured in any “fastest connection” are going to be between 2 single end points. It’s like saying..
What’s the worlds fastest freeway car?
The car might do 230 mph, but you can’t go that fast on the freeway. The freeway (internet) itself simply cannot support it. You have to do it on a closed strip. A closed strip really isn’t the freeway (internet) is it?