I guess where I'm at with this is even if someone did use a mod to give everyone exact hard data — it would only confirm what I already know is common sense. A really high mood a) builds skills quicker, and b) accrues Happiness points faster compared to having a low mood. In other words, I don't need to know the exact relationship or the exact numbers, just that the relationship is there and it's a strong one. How much I want to capitalize on that relationship with a character is part of the fun of Sims 3.