Nothing to do with iBurst. Configure a 128kb/s session on a switch e.g. ED-ES5808P and you won't notice the difference in experience between that or 10 Mb/s when browsing to mybroadband.co.za You can also experiment with this using the QoS module of the tomato firmware.
Another example is youtube. This video
http://www.youtube.com/watch?v=UE3xTHtgmTs downloads at 800kb/s and is fully downloaded by the time only 40% has been viewed. Most video codecs operate in the 128kb/s to 2Mb/s range. Likewise voice codecs are 9 kb/s to 64kb/s.
eMail operates without noticing at 64 kb/s.
With gaming download speed is immaterial as it is latency that counts.
Alternatively there isn't any "creative commons" content of any size that cannot be downloaded overnight at lower speeds.
A more accurate analysis is required than unilaterally declaring speed as an absolute metric. Flame on,
where am I wrong on my analysis of usage speeds?