This is pretty incredible...I honestly would be facinated to find out what sort of early universe event might have precipitated such a massive structure
I would just go to https://archlinux.org/mirrorlist and generate your mirrorlist there. I've heard from others that reflector isn't detected newly synced mirrors at the moment.
Most of the US ones now are synced. I haven't tried out other countries. Initially, there were ~130 that I tried and got a 404 on all of them for the latest pacman. When I tried again a about half an hour ago, only ~50 of the US mirrors returned a 404