You haven't said anywhere how you are measuring the slow speed, is it with a speedtester website or are you looking at the hub line stats? are you connecting via wifi or an Ethernet cable?
I don't think that matters much as Max observed is 32Mb which will give about 27Mb after overheads.
it would help if you could post readable hub stats from advanced settings then technical log information
you can you the 'camera' to post a photo
your estimated connection speed range is 48/35mb and according to your hub stats your have a great connection of 52mb connection time is only 9 mins was that you manually resetting hub?