I'm forced to conclude that, given the choice between doubling the polygons and fixing the JPs, they chose the easy route. But it implies they're still a few years behind the curve, since the trend in most 3D modelling software is to cut down on figure polygons and provide for more realism in other ways that are less CPU-intensive. Perhaps this means Poser 7 (2007) will have 200,000-polygon figures, but will still use Poser 3 (1997) JPs.