I imagine people who complained here took some measures of their own to determine the problem, ie contacted local isp, used pingplotter, vpn, etc., but thanks for guide, glad you have no issues on the US of A servers.
On the topic, issue seem to have resolved on its own yesterday in the evening game was playable once again with only mild and few 500ms spikes. Also not the first time it happens, on the same hops even, despite absence of #coronalag other times.
Toodles