The provider or the speed?
The provider is BT, but I think that'll be no use to you at all.
The speed (and bear in mind this is on a USB connection from the router) never got above 500k under Windows. Under Ubuntu, I regularly get well over 1M. (That's 500k and 1M per second, by the way).
The other thing is that, with no adjustment on my part at all (the router was recognised immediately by Ubuntu, and I've left everything as it is) a connection is established in about 15 seconds from switching the router on. Under Windows, it took much longer.
Mike