well I too have noticed acorns been dropping here for past two weeks, but there green acorns,
and if you ask me, deer right now will be sticking to crops till there gone, as green acorns I think need to dry before they eat them, or prefer them any how
right next to one of my food plots I have two 125+ yr old oak tree's
and with deer next to it every day, and there not eating any acorns now, just eating the food plots
so pending what your deer have as feed, I think they will hold off on acorns till there , well ripe to eat as they would/SHould be in a few weeks

just my guess though!