I agree with you Dom. In my experience, it's a lot easier to get through to someone if you are considerate of their feelings, and respect their opinion as well as your own. The more respectful you are to someone, the more likely they are to value your advice. So in that way, being considerate to the person, affectively helps the animal more than being blunt, insulting and abrasive with your advice. As they say you catch more bees with honey than with....I don't remember how the rest goes.
Constructive criticism is the key, I suppose.