So we are NOT doing a DF for 3 days already and he soundly sleeps till 7am. His milk intake is not going up however, not in a spectacular way I was hoping for... He is now drinking almost 6oz for breakfast but still some struggle here. However he is taking nice 6-8oz portion through the day so I am hoping he will self-regulate.
However I do not know if you can call it a cold turkey drop:) as we reduced it gradually from around 150, through 80-100 ml till finally 60ml for last 3 days before dropping.
Moreover, the reason I have decided for dropping it was not a small feed in the morning (which is a problem but only in theory, because if he drinks 140ml for morning feed but he still can make till 11am I have nothing against), but his very different intake for DF: from nothing to 6-7oz, depending probably on the moment of his sleep:P. And I just hate throwing milk away!
But I would make a try on your place. You can always reintroduce if needed!