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Drilled rotors are basically rice, AFAIC. You might as well put a big fake vent on your hood if you're going to put drilled rotors. But to each his own, I suppose.
but seriously...it looks like there are tiny cracks even through the solid portions of the disc.
Maybe your brembo's were a less than perfect batch?
No, if you go to the track you'll see lots of discs just like this. It's very common. They just die sooner when they're drilled because the cracks go out to the edge or to the root quickly.