You not running anything like p2p torrents or any fileshare program or MSN sending programs/pictures etc, anything running could lag ur connection right down and make it run much slower.
Sometimes even firewalls can knock a little bit off, one way to check ur on 750k is to click
http://192.168.100.1/
type in
username : root
password : root
and click on OPERATIONAL CONFIGURATION then check your upstream downstream.
This should show around 750000bps down and around 128000bbs up or something close into them figures if i am correct there
Hope that Helps a good speed test is here
http://homepage.ntlworld.com/robin.d...speedtest.html
Good luck