LOL, I see you are like me squid. You should have seen the mathematics I pulled out of the net and my physics book to find out the best way to sound proof my car. (Sound Transmission Coefficients and NRCs, loaded barium vinyl, closed cell foams and energy diffusing patterns etc ad nausea.) We'll see how that turns out this weekend.

Anyway, the whole idea behind the slotted, cross drilled rotor is that the recesses and holes remove the gas that is built up between the pad and rotor as you brake, which would keep the pad from contacting the rotor. In theory there should be more friction between a crossdrilled rotor and the pad now.

As for performance, my crossdrilled/ slotted rotors at the very least feel a lot smoother than the OEMs. I think the OEM's warped within 10,000 miles. I also like the complements I get on them :)