3071 kb/s on my RoadRunner connection.
Some other online speedtest results (click to go to the sites):
3877 kb/s2274 kb/s (I used the LA site)
560 kb/s2111.8 kb/sAll this shows that there are entirely too many variables to produce a true transfer rate. Just like downloading files, one site may only run at 50 kb/s, while I've had a couple sites hit 6800 kb/s. (Divide by 8 to get the more familiar kB/s rate.)