If I'm having a really terrible run I don't give out any commendations. To heroes or otherwise. I've also been in 8-man parties as the only healer keeping everyone alive in the most difficult situations yet got nothing (then on other days done a terrible job or had really bad lag and been showered in the things).

(Can also confirm that being tossed by the tornadoes doesn't really affect ability to keep people up in that fight as WHM... maybe they were just grumpy the PLD kept making them overheal and getting passive aggressive about it. Talking really helps.)