there should be NO delay playing games on any plasma, the one time that I have read someone with that problem on hear, the tv turned out to be bad. If you can hook up a 2nd xbox to the same tv & same input, too see if it is the TV or xbox (360?).
Button delay, like changing inputs or channels???? if so that is normal on any tv
Menu pop delay time can very a little, but .25 sec is not much of a delay.
I recently bought a Hitachi 50 inch 1080i plasma tv. When I play video games on it there is a bad delayed reaction. When I press a button the tv doesnt respond until about a fourth or a fifth of a second later. Are there any settings i can change on my TV or Xbox to fix this or is it unfixable????? Please Help