Word is CTLT slots come down tomorrow. Will believe it when DS calls with his. You can almost narrow down which LDAC regiment by CTLT dates, but not quite. You will at least be able to determine which regiment you are not attending, if that's helpful. Maybe they'll hand them both out at the same time.
Abn/AA are more Bn dependent. At DSs school it's typically Feb/Mar when they're told what schools they receive. My son knew he had a Dive school slot in November, since the preparation and requirements are pretty intensive, but I understand that's not the norm. I also understand dive school will not be offered to cadets any longer. That's unofficial, but the May class size in ATRRS seems to go along with it.