Nah too be honest, I hav't actually read a lot about it.
Just saying that I have read a lot of stuff and its a very common theme, but in all fairness is often only a few sentances and doesn't appear to be the sucject of a great deal of tested.
I also remember reading something on Advanced Aquariest Online about people using carbon to remove excessive yellowing of their water, which they belive increased the light and shocked the coral into recess/bleech.
So I am sure your theory is sound.
But in the examples above, Fay was already using carbon, but changed brands, the EXTRA STRENGTH carbon hosed her tank, I doubt it had anything to do with making the water so much clearer that lights got better.
I just chucked another 400watter light on my tank, no side effects at all, I am sure this would add more light than cleaning the water with carbon (which I do as well, my water is often sparkling).
Piez