http://webcache.googleusercontent.com/search?q=cache:bamSkYAYwuIJ:www.stoptech.com/whitepapers/warped_rotors_myth.htm+warped+rotors+myth&cd=1&hl=en&ct=clnk&gl=us&client=firefox-a
This guy seems to know a thing or two (if link works)
Worth a read.