>that'll just end up overcomplicating it.
Well, if someone, I do say 'if', someone else maybe is mixing up tcp payload rates and sync speeds then they are not comparing like with like, and so speaking the truth requires necessarily complicating it. Much as people would sometimes like to ignore vital details and not have to think about them, doing so just means they will lead themselves into error.
`in each case, the question must be asked, what exactly is the figure that is being quoted referring to. And the speed testers do not say.
That does not invalidate what you are saying though!
From your numbers it seems that your speed is too low to be explicable by such confusion though. And I am in agreement that something needs to be looked into.
I am no help, because I am on BT not TT, have ridiculously low undemanding speeds and am also a ‘premium’ customer. I also have the issues of TCP subsystems interaction with IP bonding to consider, and there may be some loss of throughput because TCP receivers do not like packet reordering.