My rotors got warped recently on a local former F1 race track.
One part of the track includes braking from 250 km/h to about to 60 km/h (90 degree right turn).
I've raced my cars for some years now on local tracks, and never had a problem with warped rotors before.
Race brake pads (Carbotech XP10).
No brake ducts or other form of brake cooling.
I know how to brake (short and firm).
I asked my BMW dealership if I could get the rotors replaced, but was told that BMW AG in Germany (where evidently all warranty claims are sent for further analysis) probably never would agree to replace them.
"Why?"
"Your rotors are blue!!"
"Well, isn't that the point?"
I was told never to drive with MDM on (I did the first track day with the car), never to use race pads (Why not? The OEM pads aren't good enough, and I have used race pads successfully for some years now), always make sure to cool the brakes down after leaving the track ( I always do), and you have tuned your car (Yes, the brakes do need to work a bit more, but the brakes should be able to handle a tad more power without problem).
In my humble opinion, the 1M desperately needs brake cooling.
If anyone develops a set (no CF please - I'm all go no show) of brake ducts I would be interested.
...and no, no BBK for me. The 1M/M3 brakes are sufficient enough.