[Sephiroth]

The Hub 3 can't be said to have a "real problem" unless you have a real problem with stuff you're doing that isn't affected by local contention.

It's exactly as Muddie says about the yellow showing the solitary maximum ping return time. The early firmware in the SH2ac had larger yellow than the current firmware.

Do remember that the Hub 3 modem mode is a bridge mode whereby all that has happened is NAT is disabled in the Hub 3 which means that there is no other route than the single port through which data can flow. So if, for example, every so many milliseconds the trial firmware is "doing stuff", perhaps sending diagnostics out, and I have no knowledge that this is the case, then it would expolain the high yellow.