That and I watched the video. It seems to me like the screen on time and wifi use helped him make it 24 hours. I do not have 4.3 so I can not confirm. But if 4.3 could quadruple or even double battery life you do not think the motorola x or even the the Droid Ultra Maxx would have been touting that feature. "4 day battery life on a single charge"... people would be losing their minds that alone would trump the fact that it is only a dual core device with 720 display.
Precisely. That level of optimization would have skipped straight to "Android 10.0" and single-handedly given Apple the pink slip, zero competition.