For 2MBPS connection the download speed will be approx 40-60KBPS and for 8MBPS connection it will be approx 200-220KBPS, as much as I am concerned. But one thing I can say, you can't never claim why I'm not getting the desired download speed, because the download speed depends on the current traffic in the line, the server traffic from where you are downloading, so it will definitely vary.