I havent seen any BayTrail Z3770 Tablet having more than 3-4 hours Battery life at full load. So I guess BayTrail is pathetic by your standards as well.
Nice to know.
It makes no doubt that theses chips power management is still not fully understood if not at all wich lead to assumptions based on scarce datas.
For the sake of the discussion i explain how power management is done in both Mullins and tablet dedicated BTs.
First is defined is a base frequency at wich the device if fully loaded will dissipate its rated TDP, this frequency seems to be in the 1.2-1.4GHz range for Mullins and 1.3-1.46GHz for BT.
From there if temperature is below the limit the chip is allowed to drain 200-250% of its rated TDP until it reach the thermal limit at wich point it will start to throttle down to its base frequency so the tests where we see the chips running at full turbo with all cores are representative as peak performance but in any way it can be called effective performance as it s not sustainable more than the time necessary for running a bench and yet, as you point it, battery life is expressed in respect of a task that would not drain more than 30-50% of the rated TDP, that is 20% at most of the allowed max power drain.