Nope - used to work for me until the site changed. I then started getting inconsistent results which weren't supported by other speedtesters (or my own experience). I reinstalled Java and so on but still get inconsisent results which simply aren't accurate. I'm not at all sure why that is - but given that other speedtesters give consistent and pretty accurate results, I simply stick with them.
Given that several friends have the same problem (one of which is a software designer and a bit of a buff on the subject) - I suspect it's a glitch in the system.
As I say - given that there are other speedtesters around it doesn't worry me - but wouldnt like someone like the OP assuming he had a bad ADSL speed based purely on this one speedtester.

If the Universe is infinite - how can it be expanding.......