I don't seem to have any trouble finding tuts when it comes to Daz, especially one's that are good at explaining things. Poser is a different matter. I don't use it so I am not much help when it comes to it. The tuts I find for it are no where near as in-depth as the one's for Daz. On top of that, there are differences between the different versions of a program. Experimenting can be a drag due to having to render your scene to know if what you did looks alright, though I believe that's more of a problem in Daz then Poser.
Now when it comes to using any program, I don't limit myself on the tutorials. Just because a tut is for one program, does not mean I can't use the basics of the information in another program. I do the same thing with 2D programs. An example is as follows...
You need a light so you add one. You want to alter what that light is doing so you go to parameters (In Daz) and look for the dials that allow you to change it...in most cases that is ambient, diffusion, color and opacity, not sure if all programs have occlusion, then there is specularity, Poser has radiosity (I know I am spelling that wrong), there is how intense a light is, the distance it reaches, whether or not you can use raytracing on it and in Daz there is deep shadow mapping. When it comes to shiny things you also have reflection and refraction.
Now to use a tut from one program for another, you first need to know how all those buttons work and what altering them will do. The two links below are for Daz and give quite a bit of information on lights, however, I have not been able to find one for Poser that even comes close to those two links when explaining lights. So you need to think like me and try tuts made for a different program in your preferred one.
http://amandabb.com/daz-studio-tutorials/daz-studio-tutorial-4-adding-lights-and-rendering/http://digilander.libero.it/maclean/DStutorial.htmNow as to the SSS and Uber Lights, I have yet to see a tut that will allow someone to use the standard that come with a program that will produce the same effect as those two types. They simply look really good. On top of that, people in general can be lazy and impatient, I am guilty of that myself on occasion so those two types of lights make it easier to light your scene, then doing it from scratch.
To get even more in-depth, you also have HDR, HDRI, IBL and I think there is one more out there, to produce better lights. The new toy for Daz is Reality Plugin.
Now when all is said and done, that is a lot of information to process and use and the lack of proper tuts make it harder. Most tuts say they are for the beginner, yet are way to technical and don't give enough information and images to explain what they are talking about, especially when it comes to Poser. People seem to be more interested in showing off what they did and not give out their secrets on how they got there. An entire day at Deviant Art proved that.
I tried to find tuts like the two links above but for Poser and couldn't find any unless you wanted to download what could only be called a book about everything in the program, leaving one to hunt for the information, or to buy tutorials and since I would have to buy them to look and see if they are even worth the money, I could not post the links for them.