So much depends on the complexity of the scene. P5 hair is slower as are the atmospheric effects. Depth of Field effects also seem to slow the render. The same is true in any application... the more complicated the scene, the longer the render. I've done some movie stuff in the past with P4. It was taking about 3 hours to render 30 seconds of frames at 15 fps. That was with one character, a simple costume and simple hair. Experiment with simplifying your scene first if you're really into rendering animations.