I believe that it depends on whether these are procedural shaders created in Poser's Material Room or if they are jpg files. Often a product description will mention if they're procedural. You might also be able to find the information you're looking for in the readme; there's a link on each product page.

If they're procedural, they won't work at all in any version of DS. If they're jpg mats (also known as mat poses - very confusing terminology), you shouldn't have any problem, though you'll probably need to tweak them (specularity, reflection, etc.) in the Surfaces tab.

There is an alternative if they're procedural and you still want to use the base models. That is to use metallic DS shaders like the kind made by the Khory_D and si_Vincent or by mmalbert. I can highly recommend products made by these folks, and the support they provide is excellent. One thing to find out from the model vendor, though, is how many material zones there are and how detailed the model is. The more zones and detail, the better results you'll get with DS shaders.

If you want to experiment, there are quite a few nice free shaders available for DS at ShareCG.com. And mmalbert and the Khory_D/si_Vincent partnership both have free shaders and excellent instructions on their personal websites, Redeyecat.com and Calida3D.com, respectively.

Hope this helps!