The skullcap is a savable prop. You can pull it into other software. The dynamic hair won't go with it, though. (Except in Vue, if you have Mover.) Most other apps can't read Poser's dynamic hair.

As for polys...the Genesis hair skullcap has about 200 polys. I've seen as few as 8 used. IME, CL recommended way too high a resolution back when P5 was released. The dynamic hair they included with P5 was so high-res that it didn't work properly in the Hair Room. For a long time, people thought collision detection was broken. Actually, it isn't. It works fine. You just have to use a resolution low enough so Poser doesn't choke on the calculations.

And I think CL understands that now. In P5, the skullcaps for the included dynamic hair had over 1,000 polys. That's just too much, even for the best computers. In P6, the skullcaps have only about 100 polys. Much more manageable!

Image is dynamic hair grown on the Genesis Hair skullcap. Collision detection is working, as you can see by the way the hair lies along the shoulder. If I'd gone higher-res, the hair would be passing through her shoulder at that point.