The speeds that they say you get and actually get from gear are two different things.
802.11b = 11MBps actual
802.11g = 22MBps actual
802.11n draft = varies but, it's fast
and since our Internet is rated at 8MBps . . . .
1995 I had 10MBps SDSL (both ways) and four digital phone lines for $150 a month. I cried the day that the service went away. Sprint thought is was easier to quit that fight Qwest, then USWest, for right of way.
Any company can make you think you are getting a certain speed. I caught my last ISP doing that and they let me out of my contract if I wouldn't sue. Some gear if you have both B & G gear linked, the router will pull the mean speed for all connected even the G gear to the B speed. I wonder about that with the Apple N routers? The only speed guarantee is hardwire (Cat5e).
Qwest has their own speedtest made by Ookla that did speedtest.net and it's at:
http://speedtest.qwest.net