1 ms... Do you live in their datacenter? I sadly don't even get that kinda RTT inside my own house.
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_req=1 ttl=58 time=0.661 ms
64 bytes from 1.1.1.1: icmp_req=2 ttl=58 time=0.638 ms
64 bytes from 1.1.1.1: icmp_req=3 ttl=58 time=0.615 ms
64 bytes from 1.1.1.1: icmp_req=4 ttl=58 time=0.654 ms
https://www.pastery.net/zppyhe/
I do have a fiber connection to my ISP, but still, 1 ms is pretty low. I wonder if something else is replying, but I tried 1.1.1.2 as well and the latency is the same.