Yeah. I think it would be possible to get pretty close to it.
C5's SSS doesn't have a lot of controls or all the little tweaks; but it renders nicely, if you raytrace it.
I think the biggest difference is that SSS is fairly dependant on lighting, and without the tweaks you have to be more careful about how you are lighting your scene.
And then, flesh isn't monotone or consistent; but you can't vary the scatter colors, or intensity (too much, you can use noise; but not maps), so it doesn't have quite the same sense of 'fleshiness'.

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You can work around most of that with map(s) in the Translucency parameter (in the shader stack, not the translucency in the SSS, that is just a slider). You can use maps to vary the translucency that way, and that will do a pretty good job in conjunction with the SSS.
It is much harder to set that up than a fast skin material is, and takes a LOT more time to do it. It also won't work well for every kind of material (there are more things than skin that have SSS qualities).

So I'll add my vote for expanded SSS capabilities in C6. Anisitropy too. But, then everybody has there wishlist, don't they?

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