If she thinks he flubbed it, I see no reason for her to hold back. She got him up to speed as best she could, not everything likely translated 1-for-1. Maybe if they had a direct line, she'd help him save face and pass it off as his own... but she is not going to sacrifice lives if she thinks he is wrong.
And after recent events, without the private line, she is likely a little rude about it. To avoid bashing the whole vault SIM, probably go after his inexperience on the island. Ooh... turn it as a 'self-assigned' failure on her part to get him ready, 'perhaps he will prove more useful as he sees us fight' sort of thing. Her tone would speak of her disappointment in him.