I recently upgraded to Bigpond Cable Extreme. Occasionally, it seems faster but who really knows? Well, here is an independent test you to try; speedtest.net. It is really easy to use. And the verdict on BPE: to San Francisco, 2696 kps down and 235 kps up. Not bad except that I don’t really know what I got before. (Perhaps some shared information in the comments will help).
Interestingly, at work here at Melbourne Business School, I got 1653 kps down and 2035 kps up. (A query into IT has been made).