I have RR-Turbo, I just ran that d/l test and got
26277 kbps download
722 kbps upload
This is this is in the morning though. In the evenings, its about half that amount.
This was on a wireless G too. How do you guys figure that wireless is limiting the connection. Wireless G can do this speed easily, and Wireless N goes much higher. The only real problem with wireless, is trying to run lag free games......it could also be a little problem if your neighbors all have wireless running too. Routers will also help with lag and to some extent speed. Don't buy cheap Wireless routers. Wired is the best for lag free response, or large peer to peer file transfers.
As for the cable connection. A time warner tech told me. Use a single two port splitter to go to the modem, then split down stream for the rest of the house......I also installed a full bandwith signal amplifier for the rest of the house.