As you can see in the image the speeds im getting havnt been considered blazing fast for years now. I hear alot about how the download manager makes the download speeds faster but since im a mac user i cant use that. If this is the reason then you need you need to put somewhere on the sign up page that macs dont support these "blazing" fast downloads.
If it helps im also on a 20mb connection, im using wireless and im in the UK. I have downloaded things in the past at speeds exceeding 1mbps, but average around 200-400kbps. Thanks in advance for the help