Rev hang comes with manual transmissions. It's annoying, but it's also how they meet emissions requirements, so it's not GR/BRZ specific. From my Fords, it should not be a factor during aggressive driving, so if it is, then that would be a GR/BRZ specific thing. All my cars have been relatively loud (funny enough, the '08 Camry temp car is louder than the '16 Focus ST was with similar mileage, though mostly because of all the Camry's rattles and clunks), so I've never understood the good stereo thing—I can't hear the full range of sound, anyway, unless it's cranked high enough to drown everything out, in which case, eventual hearing damage will mean I wouldn't hear that range in the long term.