What is so good about speedtest.net, all the givaways say "and i need a speed test from speedtest.net, not from your computer, It must be from speedtst.net".
There are may other better speedtests. As a matter of fact flash based ones (like speedtest.net) are the worst and least accurate especially if you have a fast connection ie. fiber.
Java based speedtests are much more accurate. Try this one: http://www.dslreports.com/speedtest?java=1
You can still get the nifty little image that says your DL/UL speed