@chrisjames the RealSpeed test works by having a software 'agent' or deamon running as part of the Hub's firmware. Now you won't be the first to report that this stops working for no obvious reason and a reboot doesn't kick it back to life. What does seem to work is a full factory reset of the hub (the stick a pin in the reset hole for a minute) which also wipes out any custom settings you might have made.
Now having said all that, I do have to say that I have some real reservations about just how reliable this speed test is, not - I hasten to add - that I think anything is wrong with the SamKnows methodology, more just how well it has been implemented on the VM hubs.
Let's take what you reported earlier;
"For the first few days SamKnows said my router speed was 1.176gb day after day."
Now how likely do you think it is that your internet speed to the hub would be identical on every measurement to four significant figures for a couple of days. That's just not how internet connectivity works - I'm sorry but that's just not believable!
There have been a couple of posts with screen shots showing a speed to the PC as being higher than that to the hub - which is interesting! And yes, I do know that these are asynchronous measurements - but still!