I use just-ping to ping Google public DNS server, which IP is 8.8.8.8. just-ping can ping a host from 50 locations worldwide.
I found that DNS's latency is low around the world. Many cities are far from each other, but they got the same low latency in ping (about 5ms).
I suppose the IP 8.8.8.8 is directed to one host. How that host reacts so fast even it is faraway from its clients?
Thanks!