Well - when you can turn all but one of the cores off (or down to extremely low power consumption), and/or when you have asymmetric cores where the one core tha

Well - when you can turn all but one of the cores off (or down to extremely low power consumption), and/or when you have asymmetric cores where the one core that runs alone most of the time (when the device is sitting there, waiting for user input) is an extreme low power one, then yes, more cores mean stingy power use.