I threw a slotted rotor and upgraded pad kit from Stoptech last spring. About 15k miles on them (2 TOD trips and a couple track days) and all 4 corners started grinding at the same time with zero warning. Anyone else have this happen?
I don't have experience with StopTech pads or slotted rotors, but I do have some experience on the track with my FiST a couple times (6?) in the last 8 years. I usually predict that "normal" FiST brake pads (Mastercraft summer, EBC yellow, EBC Blue) with be gone in 2 track days (4 or 5 15min sessions in a day at DCTC in Rosemount MN- which is a small "slow" speed track - 90mph max).
So your experience seems about right depending on the temperature rating of the brake pad that you are using. The EBC Bluestuff pads I used held up a bit longer than the Yellowstuff, so pad temp rating is quite important.
I do find that my car eats both front and rear pads pretty evenly on track since the rear is used for a lot of the electronic stability control stuff that you cant fully disable, so all 4 at once isn't too surprising either.
I'm not trying to sales pitch anyone's product, just what I have experience with. I currently run the Motorcraft "summer" pads since they are half the price of EBC and work almost as well (quite squeaky in the -10F weather we have had this week lol).