Right, but my point was that I think you're reading into the diagram beyond it's intended purpose. I'm not sure how you can tell that they're logging only the s

Right, but my point was that I think you're reading into the diagram beyond it's intended purpose. I'm not sure how you can tell that they're logging only the server-side delay, and not the client-side delay, from a systems diagram which shows each of those as a box connected by a bi-directional arrow. For instance, it's clear to me that they don't include the latency included by the game engine in that metric, but not whether they include the server-added latency or if they're aware of it and subtract it off.