[Nil]

You'd be struggling to view YouTube videos with that speed.

Is that the result of an Isolated test, meaning there's no other connected devices nor any background tasks consuming bandwidth?  Also, perform a router reboot and check your DHCP/ARP and make sure only trusted devices are on your local network. Of course, this Is on the grounds It's not an ISP Issue.

That was a result of my speed for a mere day and has only come and gone since then. Speed has been feeling better lately and just got 5.5 Mbps download. It may have just been the result of the ISP making changes that would have affected my connection that badly, as nothing I do on the user end could have possibly caused such congestion.