I think the results from Speedtest.net are officially very rigged:

Please see <attached below> screen shots of :

1) speedtest.net - 2mbps

2) http://www.cnet.com.au/broadband-speedtest/ - 380 Kbps

3) actual download in action - 17 Kbps

We could try compare with an actual download from a reliable source and see the speed - where is the bottle neck ???

w/regards
Stephen N.