Not sure about the http://netneutralitytest.com/ test. When I test the AWS East server I get the full 50mbps that I'm paying for. Yet if I go to Netflix, the stream is horrible. Using the CTRL+ALT+SHIFT+D trick in the browser window, I can see that the bandwidth measurement to Netflix is hovering around 1mbps which is unacceptable.
During non-peak times the bandwidth measurement is usually between 20 and 30mbps and I get full HD. Once peak time sets in around 3-5pm it drops down to 1 or less than 1.