Edit: The site ate the second half of my comment! Fixed now...
[citation][nom]bonezy[/nom]A couple of things: I wouldn't want to fumble around with batteries in mid-match. It might even pause certain games in a tournament round because of dead batteries, and you'd piss off everyone, and probably disqualify you as well.[/citation]
Did you even read what I said? I said anyone with half a brain would put a new pair of batteries in their controller before an important game. If your controller eats a fresh pair of batteries in less than 15 minutes, you've probably got bigger problems.
[citation][nom]bonezy[/nom]Secondly, I'm sorry if you can't feel wireless delay. I've tried 6+ different wireless mice and about 20+ wireless controllers (from PS1 onward), and for the most part the lag is noticeable. Sure, the MS 360 one is better than most, but as a tournament Street Fighter Alpha 1/2/3, MSH, MVC 1/2, SF3:TS and CS:S player, let me tell you that I will prefer wired 9 times out of 10.So before you spout terms such as 'humanly noticeable', please be sure to do research on humans other than yourself.[/citation]
The controller's designed for <4ms of latency. Independent measurements have shown that, for your average Joe sitting ~5m away, it's under 2ms. That's completely negligible and is, for all intents and purposes, basically undetectable. Your TV parsing the image will add more lag than your controller will. And before you go spouting about research, why don't you just google "Is 360 wireless controller lag noticeable?" Hell, the first result is an MLG post citing a 1.78MS lag time on wireless controllers.
Noticing a 2ms difference isn't humanly possible. The old knee-tap reaction test? 30 ms delay. Minimum time to be able to recognize an echo? 20 ms. 2MS? It's like lighting a firecracker 2nm from your ear/eyes, then saying you could tell the difference between seeing and hearing it.
As far as your experience with wireless goes, it sound likes either A) you haven't used current-day wireless controllers much (all PS1/2 controllers?), or B) (more likely) you're playing in an environment with a lot of interference.