Currently i'm using MediaNet and a Sony Ericsson K850i (3.6Mb/s HSDPA). Download tests have revealed i'm getting at most times 800-1000KB/s down. You also have to realize since it's still packet switched and not true "always online", it does take a few moments to initially send the request and then receive a response from a website. One thing that would make the pages load faster is obviously a faster processor in the NIT. There are also some tweaks to the browser config one can try also.

*I would be interested to see what other combinations others have used/use and their experiences.