At my last house, 200m from where I am now (also uses the same cabinet) I got a solid 72 down and 18 up all the time no issues.
Where I am now, I get 60 down and 15 up, yet lower ping.
Doesn't make any sense to me. Connection is also very time dependent (in the evenings there's a noticeable slow down, to the point where game downloading on steam and origin drops to 3MB down. This is with BT. I'd happily trade the upload for a more reliable connection. Thing is, bt deny throttling, but they must be doing it otherwise I wouldn't get a slow down.