GREAT POST! I think a lot of folks have been stating very similar things in several different threads.
My Peppy is 3.25 lbs. after eating and before pooping. He is as healthy as a horse, and is as outgoing as my 5 lber and my 7 lber. I don't consider him small or tiny. I never saw his parents, but from what I understand they were normal breeding sized Yorkies who just threw small offspring.