I'm getting 60+ Mbps down and 20 up on my DSL line. With vectoring it could go to 120 down. It is VDSL not ADSL, but still over copper pair - significantly more than 20 down.
I thought with more vectoring your latency continues to jump?
Who is your provider? I don't recall anyone advertising that kind of speed on a real ADSL or VDSL line. You must be sitting on top of the local DSL drop either way to get that kind of transmission speeds.
All I know is that I tried U-Verse (which is a VDSL product) and they couldn't consistently even keep me at 19.2, from which TV has to come out of that as well. I'm not even that far from the "central office" drop either.