Agreed.
The exchanges on a message board are obviously text-based and it seems people always undermine body language. Therrien's body language in that gif is the body language of a guy who knows he's making a mistake.
It was the same when he was talking about Subban a few years ago. All you would read here were the transcripts of the Q&As between the journalists and Therrien, leaving out all the sighing and 'euuuuuuhhhhhhh' while looking at the floor. Anytime Therrien gave Subban some praise, his whole body language was the one of an extremely uncomfortable man.