Jetbeam's listed specs of the Mk.II models say that it's the same brightness as the original run, so what Doug saw in his reviews is probably just the result of the Luxeon lottery. Remember that a T bin LuxIII is rated at 67.2-87.4 lumens at nominal levels. Quite a spread. It could simply be that Doug's Mk.II example didn't have as good a T bin LuxIII as the first one. I believe that the original run's emitters were also hand-picked to some degree, so this might have had something to do with it as well.
Maybe it is dimmer, maybe it isn't, maybe it's just the Lottery. It'll take more than a single comparison to find out for sure.