I think you missed my point. I agree ED is for people for whom Penn is their first choice.
Penn had an early decision program before, now they have made it even more restrictive (students now also cannot apply early ACTION to domestic private schools). The new and more restrictive ED program they have is not good for students who cannot predictably ascertain if they will get ample financial aid from Penn (look at my previous posts and @MurphyBrown 's post) to see what I am talking about.