Sigh! I guess I will offer my opinion here. I have been a teacher for 45 yrs and in my experience, getting down on new students does not help them learn, but rather turns them off to the subject matter. I am not saying you need to be PC (in fact, like Brian, I am very much against it, it hides the truth.) but one of the main tenants of teaching is to use POSITIVE feedback to help people learn. There have been times here when that has not taken place. I am not saying that it needs to be "everyone is a winner" but pointing out errors in a positive light is a much better way to approach people and more likely to help people learn (and keep them interested).