I definitely had dedicated check in for business on united in January. No dedicated security line, but post security. Will be flying out motzai shabbos on AA and will update IYH (flying in was a breeze, although there is now the passport line but was quicker because you already had the blue ticket from the machine).
Got to airport at 1023. El AL was mobbed (D) AA was in C and quiet, notwithstanding that half the line was elal passengers.
No business class security line
Got was done with security at 1041
Was done with (priority) check in at 1044
Security lines were long but moved, was through security at 1057 and passport scan was another 30 seconds.
ETA AA 777-200 possibly the best hard product I've ever flown ex tlv in J.