I normally use speedtest to keep an eye on things, which I think is multi thread. We had a power cut about 6 days ago, in the middle of the night and I have noticed a speed increase of about 6Mbs up to 60/61 Mbs for my line since.
To check this out I did a TB test and that agreed
but it did show a low figure of 21.1/21.8Mbs.
I am actually very happy with my connection, but does this show that perhaps it is not as good as I have always thought.