Seems like research supports this: ieeexplore.ieee.org/iel5/16/5896011/05773485.pdf?arnumber=5773485

From TFA:

(3) Data travel distance is around 800 miles (round trip) on this demo as that's where the server is. I get a 21 millisecond ping on that route. My final delay will be 10 milliseconds as I just added a server in Irvine California yesterday, but it's not added to our grid yet. (So this demo is twice the delay I personally would get, the good news is I don't notice it anyway.)