i would say impressed, but i don't think thats the right word, how you managed to get through discs' pads tyres etc in such short time.
do you remember the film days of thunder and tom cruise shows how quickly he can track the car, but the tyres don't see the end of the race, so the old man gets him to drive to his style, he works out to be quicker and the tyres last the race.
i'm wondering if it has nothing to do with discs and everything to do with driving style. the DBAs aren't cheap disc's and they are designed around track use. so to crack them in such short time is er unique. do they not require a cooling down procedure i thought with any track day, you have a cold lap before coming in to cool the brakes etc.
i'm not saying your style is bad, as i've never seen it, and you may well be quick, but may be you need to adjust it to accommodate the life-cycle of the parts. i wouldn't be surprised if you haven't boiled your brake fluid and need that changing as well