Originally Posted by bmwpowere36m3

^ That's not accurate, standard vented rotors have nothing to do with brake pad gas venting. Vented rotors don't increase thermal capacity, unless they contain more mass, however they will cool down quicker between stops.

Cross-drilled or slotted rotors on the other hand do "vent" brake pad gasses, but even that is overrated. The best benefit of either of those types of rotors is that they constantly "refresh" the brake pad surface by skimming off its top layer. However they come at a higher price and typically much shorter life...