There are too many variables to really say if the time is reasonable. I have taken more than 3 hours on a single image , and a lot less than 3 hours on a 30 second animation. What the figure is doing makes a big difference.

The killer in animations is rendering it all, that can take days.

Posser does not have the tools available in some high end applications to do things like accelerate away, or decellerate to a stop. Those have to be keyframed manually. It all takes time.

@stimuli , do you get the same problem creating a set of single frame images.  Maybe try a different codec ?