Indeed. Surprising that such a technical article from a supremely technical and knowledgeable person would not at least have a disclaimer about it. I would also be interested to know how much a Starlink satellite is an ASIC router vs pure CPU.
I believe a better technique would be to ping _through_ the router to another endpoint under ones own control, on the same network as the origin client, and where processing latency can be controlled. Basically ping yourself but via starlink and back.
That said, in practical terms he's quite right about the jitter problem. I maintain 2 networks myself at my remote home. One my microwave WISP for tight latency and jitter, and then Starlink for much better bandwidth/throughput.