Don't forget that you are paying for a contended service, a service that is shared with many others. You are paying for a service with speeds of up to 750 kbps downstream and up to 128 kbps upstream. These speeds are not guaranteed and will depend on how your computer is set up, what your computer is doing at the time of the test, what other users on your UBR are doing with their connection, what traffic is going through every router between you and the target site and many other factors. A speed test article can be found at
http://www.cableforum.co.uk/board/article.php?a=22 . A very good site for troubleshooting cablemodem problems is at
http://homepage.ntlworld.com/robin.d...ips/index.html .
If you look on th adslguide site that you did the speed test on you will see a table of average results from speed tests done on ADSL 512 kbps connections. The top performer at the moment is an ISP called NDO with average downstream rate of 451.6 Kbps and average upstream rate of 234.0 Kbps. No one gets the full maximum speed they are paying for all the time but cable connections tend to be able to get nearer to it than ADSL connections.