Multiple upstream ports per downstream port is also normal (because of the asymmetric nature of it). A node can thus be fully segmented in the return (each coax port has its own return), but not necessarily in the forward.
I've seen my upload speed jump up to a 984Mbps max packet burst on occasion, maybe it's somebody working or experimenting on something somewhere, so I think gigabit packet upload speeds is possible somewhere down the road. Using Hub3. M200 package.
I took a screenshot from Windows 10 performance monitor😃
Maybe it is an Error, but other packets ranged between 300 and up 😄 also took a video of the proceedings
That's Kbps. I've just tested it on my PC and it shows both send and receive in the same format (either Kbps or Mbps). There is also no drive activity which would occur if it was reading or writing a file at over 900Mbps.
It's unfortunate that you didn't record the Ethernet tab rather than CPU, as that would have shown the exact figures for the avoidance of any doubt.