I agree, and it has been beaten already....ad severe nauseum! ;) Not to mention this is something that is covered in the owner's manual. This is like one of those synthetic versus dinosaur threads.
All that needs to be said is that the ECT allows the tranny to shift at a higher rpm, downshifts more often, and shortens time between shifts. Whether you can feel the effects or not is a different topic. Personally, if my car were to shift at 3,000rpms vs at 4,000rpms, I'd never feel a noticeable difference.