I have taken TT fibre for a number of years and I have been happy with the service. My max downstream was 61500kb capped off at 39999kb this gave me a download speed of 36000 - 37000kb. I have taken the fibre boost since 3/7/19 and I am very disappointed at the small increase in download speed. The max downstream is the same at 61500kb and the new synch of 51150kb which has given a download speed 38000kb. So my increase in speed for a 22000kb increase in synch is 1000kb. This can't be right !
Where are you getting the maximum rate from? If it is the so-called attainable rate on the router this is generally a bit higher than the actual sync speed possible. What is odd is that with an increase of around 11000 in sync you are only seeing a throughput improvement of 1000. Is this based on wired, or wireless test results?