Yes except that it is perfectly possible to pinpoint the bottleneck.
I used to run a network where factories in 15 countries were connected to our systems here in the UK. We certainly would know where the lag was at any time. Certainly if it was at the server end. Results of ping tests are simply intercepted and interpreted for example. The point of my post was my annoyance is precisely with the wording. I want it changed. Be more precise.
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