In most all cases, that's been my experience. When you get your brakes hot, and then sit at a stop with the brakes engaged, the pads deposit some of their friction material onto the rotor. Once everything cools, that friction material makes the rotors feel warped. The easy solution to "warped rotors" in 90%+ of the cases is to go out, and get the rotors quite hot by repeated hard braking events without coming to a stop, much like the typical bedding process. Once the brakes are good and hot again, the deposited materials come off the rotors and bam!, no more warped rotors. I usually do this on a back country road early Sunday mornings when no traffic is around. I usually do 70mph-20mph HARD braking events, accelerate back to 70, and repeat 5x-8x. After that, I drive for a bit to let the brakes cool and go on my merry way. Usually takes 15 minutes total. Depending on what brakes you're running, be careful to not overheat your brakes to the point they fade. If you get to that point, you can assume your brakes are hot enough...