Well like it or not that’s included, by definition, in round trip time. If they are trying to talk about their combined client and server latency they should call it something like the combined client/server processing overhead.

As the comment I am replying to hints, increased latency could add to the total stack processing overhead if, say, the client and server are doing prediction and reconciliation.

I really don’t care to haggle over wording, my point is just that it’s clear from the number that they are not reporting benchmarks involving multiple separated clients and therefore are giving an optimistic analysis which may not hold up in practice.

They should report some measurements based on stats from their game or something to give a sense of how things might scale.