Mine's perfectly fine. Nice stable 8 mbps connection, with fairly decent pings.
But as Paul says above, ADSL depends on different things & can be quite variable (line length is a big factor, as is "noise" [ e.g. from poor extension wiring etc.]).
Have a read of these:
http://www.cableforum.co.uk/board/63...nd-16mbit.html
http://www.cableforum.co.uk/board/63...ving-poor.html
http://www.cableforum.co.uk/board/63...-and-info.html
btw, the speed test results you posted are not accurate... I doubt you'd have a 412Mbps connection with anyone