Hmmm, we bottle feed and we do the DF at 11:30. We never thought of leaving him in his crib and honestly, I don't know that I will do this, because I don't want him to go back to sleep without burping, it can cause gas. Well anyway, to add my two cents. We just started the DF a few nights ago, to elliminate a 1:00/2:00am feeding. It can take some time to work, so you have to see it through to see the effects usually. Grayson is still waking out of habit, but much later than 1:00 and we do the sh-sh-pat back to sleep. He goes back to sleep in a matter of minutes. The second night of doing it was awful, he cried and cried, but that is because we also took away his pacifier at the same time. I don't know if you will run into this. If you interested in the DF to elliminate other night feedings, I recommend it highly, but give it some time to work, if it doesn't work right away. Grayson is going all night without eating and wakes about twice for a quick patt-patt back to sleep.
Jessica