Would it be clear from 100km+ away? I think that low latency can act as a proof of being close and fast, but once the apparent network latency goes up how do y

Would it be clear from 100km+ away? I think that low latency can act as a proof of being close and fast, but once the apparent network latency goes up how do you know that server times are low if the server can claim the time was spent on the network?