Cross drilled vented rotors make that gas dissipation a lot easier.... Honestly I doubt that typical city driving where the majority of braking is done will generate enough hot gas to make a difference, and a momentary release of the brakes just prior to the complete stop is not going to give all the thermal mass of the brake pads and rotors much time to cool. But you may as well keep doing whatever works for you. I suspect the brake pad friction material compound is a larger contributor to how long the pads last.
-Rod