I agree with the above, but I'll explain why the speeds you reported in your last question don't match the speeds you see here.
When you connect to the internet, your computers first go to your wireless router, and then down the phone line to your ISP. Then your ISP does some clever stuff to grab the website you want, and then feeds it back to you.
All these different connections operate at different speeds, and you're very much affected by the slowest of these speeds.
Imagine it being like a baton in a relay race, router computer running with it to the router, then your router running to your ISP, etc.
If just one person is slow, it'll slow the entire race down.
The speeds that you were reading, reported in windows itself, are for your computer to your router. Normally, this is 10mbps or 100mbps for a wired connection (ethernet), and 54mbps for 11g wireless connection. This is the maximum speed possible here.
However, your internet connection (router to ISP) is likely only about 2mbps. Thus you'll never ever see 54mbps speeds or anything like that.