From the article the reasoning for dried leaves is:
"these leaves will be depleted of chlorophyll, sugars, sap and etc through a natural process and as such will not decompose in the tank and foul the water, as fresh or wind fallen leaves might. Aslo the beneficial properties of the leaf litter comes from the tannins and humic acids that are naturally present in ‘dead’ leaves."
I've fed fresh leaves for several years, and I can state pretty confidently that food leaves are eaten pretty quickly, and I've seen no fouling of water happen. Perhaps it does with hardwood leaves, or IAL?
I also don't understand how how the article can state dried leaves will not decompose. That's exactly what they do. Our shrimp are clean up "bugs."