I can tell you what I see is interesting.
Is that if BT sold adsl2 from cabinets that would help people in your position.
The attenuation on D1 is 30db. For adsl if you had 30db attenuation you would have a much improved signal over your old adsl. But from cabinets vdsl2 is the only service offered by BT. The problem with the VDSL2 service however is to protect existing adsl services the frequencies that conflict with adsl have the power cut back, and it seems your conneciton cant make use of the frequencies above those hence the poor sync speed.
This power cutback to protect adsl has probably lost you 2/3 to 4/5 of the signal you would otherwise have. Ultimately there is nothing you can do about this as openreach dont provide adsl from cabinets and the vdsl2 policy is there for good reason to protect existing adsl services. I think you would be around 10-12mbit sync if on a adsl from the cabinet service.
BT Infinity 2 Since Dec 2012 - Estimate 65.9/20 - Attainable peak 110/36 - Current Sync 71/20
Edited by Chrysalis (Tue 08-Jan-13 03:43:40)