Well, I finally got my speed upgrade from my cable provider, ntl, yesterday.
A free upgrade from 3mb to 10mb, not too shabby if I say so myself.
The speed of the download in the screenshot above is typical when downloading from reputable download sites, ie. mirror.ac.uk, but as with any connection, the download speed can only be as fast as the server can/is configured to go.
I have to say though, 23 minutes to download a 2.5gb Linux (DVD) Iso image is pretty good going!