I've only seen one counselor (well, two but the first was in such short duration it doesn't count) and I am no longer seeing her, but I can confidently say I would be blunt if I were upset with her. Because I became upset with her and was rather blunt about it. I've not the ability to smile through the fury as some seem to have, nor have I ever been able to differentiate between who I am and who I'm not allowed to argue with. I can in theory; not in practice.
I would never yell at any person, however, as that would be disrespectful.