It's not a matter of what '..would be best..' - that's impossible to judge w/o all the context, and even then it's subjective. My point is that there are some

It's not a matter of what '..would be best..' - that's impossible to judge w/o all the context, and even then it's subjective. My point is that there are some occasions where is does make sense to 'tell your audience you haven't prepared', so I disagree with your hard-and-fast assertion that 'you shouldn't tell your audience you haven't prepared', and the blogger's assertion that 'when you say “I’m not really prepared” in front of an audience you’re showing them the ultimate disrespect'. Such black and white rules don't seem valuable to me. It's horses for courses..