*"Your average "hot chick" with average muscularity and average body-fat can indeed get by with very few polygons.**  In this case 17.000 polygons."*genesis looks like a ball of pizza dough shaped into a human form.

there was nothing wrong with V3, V4's polycount. dropping to 17k polys was a step backwards for morphers.

and displacement maps are great for detail but costly in terms of rendering at high resolutions. normal maps are less so, but dont displace the mesh. depending on what you are making it may be less costly (and look cleaner) to just have the detail in the mesh than to do it with a displacement map. like the forend of this 870, for example.

the entire thing is around 5k polys and the type of resolution i make for Poser. theres a lot of detail youre not seeing such as the bolt, lifter and follower.