I'm not entirely sure, but I think it had something to do with having a little time to myself and breathing room (when usual mornings offer little of either). (onbeingmom.com)
-- we used Dr. Jay Gordon's method and it worked very well for us — a year later, she still occasionally asks to nurse if she wakes up in the middle of the night — i either offer to hold her instead or tell her that Mommy's nurses are sleeping and that we can nurse in the morning (mommypotamus.com)
On the other hand, early mornings offer a fresh supply of willpower, and people tend to be more optimistic and ready to tackle challenging tasks. (entrepreneur.com)