The numbers seem completely improbable. No one would trade on 15-second-old market data: "And perhaps this means 15,625,200 us of latency as measured at t MD 3 at the telco gear interface to the building’s fibre (generously)."

Secondly, you cannot reason about network latency based solely on bandwidth. This matter is more complicated and depends among other things on the type of the medium and signal modulation techniques. One can have low-bandwidth ultra low-latency link.

Also, most players in the game use kernel bypass so processing packets is a matter of nano-, not microseconds.

Otherwise, a very interesting read.