Originally Posted by BarracksSi

Well, you can back off one pad or the other so that it doesn't rub against the rotor. If the rotor's a little warped, you'll have to back it off kinda far, causing you to pull more lever when it comes time to use them.

You can get them so that they're silent but with good response, though. If the alignment of the caliper is a little off, the pads will be angled, and effectively have less total clearance than if they were straight. Also, the newer wrench at my LBS used a tool to straighten the rotor, eliminating the slight warp that it had before.

Right now, that bike's disc brakes are simply excellent. Quick stopping, no extra noise, and good modulation. Not bad for mechanical Avids.