Ill run some more of the multithread tests, I know your tests are good and your results are what I used on many occasions to make my point in the past to Xfinity (Comcast) that the problem I was having was on their end not my equipment nor something to be expected or normal Since I have the ability to bring up past results and can show a history of multiple test results and when exactly the problem (Usually drop in Download speed) Started.
That was why I was concerned and posted on here as I was puzzled as to what had happened.
I will have to look at my result history to see how many tests I did prior to installing the XB8 Gateway as far as when I installed it I got it on Sunday 7-17-22 somewhere around 18:15 PDT I had some issues getting it provisioned the Customer service person was confused and did not speak very good English so it was hard to explain why I was calling so I think it took an hour or so to finally get it connected.
One thing I did do (By Accident to be honest) was update a couple of my programs that I use in iRacing while the Task manager was open on my second monitor and I seen it downloaded the file at 1.2 Gbps but it only took it about 10 seconds max I just got lucky to look at the monitor while it was downloading.