I do give my commendation to whomever stays in the room long enough without exiting.

I notice if you load too slowly people just leave the room...regardless if you skip a cutscene. (including victory pose)

lol:
Definitely
(-) people who leave the room before the person who does get my commendation.
(-) whole groups that just exit before I load into the area/get back there if I die

I think this can be avoided by not rushing content especially when there is one person who doesn't have a chance to commend anyone at the end. (my definite minuses)