have now seen "Urban Acrobat" on Sony 2012 HX855 (Motionflow), Philips PFL6097 (Perfect Natural Motion) and LG LW980 (Trumotion). All of them produced artifacts in different situations. The legs and hands of the actor were blocky during the fastest spins and jumps. However, Philips PNM differed from LGs and Sony's as it had the smoothest background motion (=the urban scenery: walls of the houses) of them all. The notorious backflip jump was the low point of Philips PNM as parts of the body disappeared for some of the interpolated frames. This effect is visible in manuj youtube video. Overall, every TV produced different artifacts in different situations but Philips motion experience was the smoothest.
This sample video is very, if not the most challenging naturally created action movie (no special effects) and it was not clear if I preferred such amount of motion and action in 24p or with some interpolated frames with artifacts..