the big elephant in the room is that Bitcoin and Ethereum networks have good latency because the guy in rural Africa simply doesn't mine because he as no chance

the big elephant in the room is that Bitcoin and Ethereum networks have good latency because the guy in rural Africa simply doesn't mine because he as no chance of making money, if people in remote regions with very bad connections entered the game the propagation time to 95% of the network would go to 60s or more.