I'm on DSL and usually, on a good connection (15+ connections), can get around 100 KB/s. Most of the time it's one or two people with a good connection, such as cable, and a lot of dial-up speeds around 1-5 KB/s. The max I've ever gotten was about 320 KB/s, but that was a popular file with a lot of seeders.
It took a while at first to configure the connection settings just right. First I had to change the port, then the port range, and then go into the modem and set a port trigger or something like that, so I could actually connect. If you haven't already, you might want to read some tutorials on how to do that, since that can make a drastic improvement; although it looks like you've already done that...