I believe (but correct me if I am wrong) that even Carrara does true SSS.  Heck, there is a plug in for Daz Studio that does SSS, or at least does a really nice approximation from the samples I've seen.

This is really Poser's weakest area, anyone will tell you.  When freebie software and low end apps can offer something as crucial to human flesh as SSS but Poser, the supposed premier people rendering software app can't, well, there is a serious out-of-touchness going on, I think.

More then anything else I think that this is a true detriment to Poser.  The past two owners of this fine application should be ashamed.  I would really like to see them address this as a patch and as soon as possible.  I think it is an insult to those of us who use the software.

On the other hand, there are many people who refuse to employ Raytracing, so maybe there is money in catering to the lowest common denominator...