Feffman, he was told directly by Subaru his the brakes on his 09' WRX would work great at the track, hence why he's replacing all the rotors and pads now. Pads aren't the problem though, it's getting the rotors to hold up from pads like those as his S2000's rotors were trashed by carbotechs from all the bite they had.
Stock suspension or not I'll be there and have no issues, ridden in a couple stock suspended Stangs and they do well up there for what they are.