I gotta say that of all the things to get bent out of shape over these days, this is not one of them. His boss was fired and his job is to give him a send-off in front of the troops. Of course he states he contributed wonderfully and so on. You don't stab your superior in the back, especially not in public, especially when he is out the door anyway.
You say thanks, great job and you move on. Comey's a dead horse. No need for his former subordinates to keep beating him.