I think those are the important line specs, especially the attenuation and noise margin. Your line looks much better than mine. A speed test last week suggests that 5Mb/s is possible on my line but if your figures are consistent it looks as though you could get the full 8Mb/s.
Umm.... 1967996 Kbytes downloaded in 20 days Frank? That's 96 Megabytes/day, every day. Exactly *what* are you downloading? :)