I do mostly highway driving, so at 11k I don't feel any rotor warp. I have had problems with rotor warpage (mostly Ford) but I don't entirely blame Ford for the problem. One of the most persistent problems leading to rotor warpage is the use of impact wrenches on alloy wheels. When tires are rotated or the wheels are off for any reason, there is a tendency to put the wheel back on and use an impact wrench to tighten the first lug nut to full-tight (and usually way ABOVE the recommended torque setting). You know this happened if you have a problem loosening a lug nut with a standard wheel wrench included with the car!
Wheels should be put on after lugs are lubricated with anti-sieze, and the lug nuts should be finger tightened all around before being torqued - by hand. Torque setting should be reached in two stages - roughly half the desired setting all around (in a star pattern), then fully to the desired setting in a star pattern. If the torque range specified by the manufacturer is, for example, 80 to 105 lb.ft., set the wheels to 80 with the lubricated studs. Following this should reduce or eliminate future warpage.
Also - don't let anyone skim cut or turn the rotors. When a warped rotor is machined, you create thick and thin spots on the casting, and this difference in the heat sink results in even faster warpage next time around. If rotors warp, they should be replaced.
When wheels are installed with lug nuts tightened with impact wrenches, all kinds of stresses are introduced into the nut/wheel/brake sandwich. Rotors get VERY HOT and they are the first ones to "stress relieve" the package by warping. The wheels are much heavier and are subjected to less heat, so they don't distort. The rotors are the "weak point" in the assembly, so they react to the stresses first.
Do yourself a favor and don't let anyone other than you touch the wheels. You will get long life from the discs - even factory ones.
Incidentally, Ford had a TSB on the '94 SHO which I had, telling the dealers if they used an impact wrench on the wheels, the dealer would be responsible for replacing the rotors at no cost to either Ford or the customer. I don't know why they singled out the SHO - except they were tired of paying for warranty replacement of rotors. I think the logic applies to all disc brake cars with alloy wheels.