as far as I know, the only champion of SSS in DazStudio is the user known as LATICIS, his render about SSS on deviantart proves that.
It only seems that way as He has made his findings public and he can do a lot of testing and with help from others I thought I knew a lot about this subject due to my testing over the years and only recently have I started to get a handle of things. But some aspects I found I know very little when I started to get deeper.
I always thought the SSS shading rate was better higher than being low , opposite of the render setting shading rate.
Never heard of the 100% balance between Diffuse and SSS until recently and I am still unsure if that is correct for Uber Surface etc. As some have already mentioned that the skin texture maps we use have SSS burnt in given the nature of how they are made so in essence everything is a cheat. I honestly don’t think there is one hard and fast rule when it comes to this, yes there are guides lines that we could use to set up Uber Surface form the get go and then tweek as required.
Laticis certainly does impressive work. There are others, too: certainly DimensionTheory (with his Interjection products), RawArt has a good (free) tutorial here, etc.
The sum of 100% is good science (I think, anyway), but it doesn’t seem to correspond with how things work in DS. Or LuxRender…I did do a couple of quick tests in Luxus. So probably it’s due to the skin maps as you say, Szark…that sounds logical.