I am pretty sure that /sit did trigger a crit as well as the effects (like reckoning) back in the days, that a paladin one shot Kazzak by dueling with a feral druid (fast 1.0 atk spd) and sitting to store the reckoning charges. This was later changed to reckoning had only 4 charges max. , but reckoning (as well as other similar talents) triggering from a sitting player WAS how vanilla worked.
That "not a bug" list is actually trying to fool us.