I should have maybe waited a tad longer before doing my happy dance... :-(
The DS isn't doing his habitual waking for DF anymore (which, don't get me wrong, is FANTASTIC), but he's now waking closer to 2 or 3am for his NF and more often than not NW a few times after that.
I'm really hoping it has to do with all the changes in mobility, activity time, etc., because I. Am. Exhausted. Crossing my fingers that it will pass sooner rather later. :-)