No, those bars only indicate the signal strength, they don't have anything to do with the data rate. At least not when you're in the 75%+ range. Even if you ran an ethernet cable to the system, it can only connect as fast as your Internet connection, so unless you're trying to stream hi-def video from your desktop computer or something, you're worrying about nothing.
I currently have my 360 connected to a wireless router on the other side of the house (a couple rooms away). My Xbox live shows me at a steady 3 bars with an occasional bounce to a 4 bar connection. Four bars is max on the 360. How can i achieve a steady 4 bar connection? I've heard that if I "hard" wire my 360 directly to my Netgear Wireless (N) router I would see the difference in the connection. But will it get me the 4 bars?
Are there any other tricks or tips i could try? I really don't want to run a Either cable throughout my house.
thanks in advance!