The customer is always right' may have become a standard motto in the world of business, but the idea that 'the audience is always right,' has yet to make much of an impression on the world of presentation, even though for the duration of the presentation at least, the audience is the speaker's only customer.
Lend Me Your Ears: All you need to know about making speeches and presentations (ed. Random House, 2011) - ISBN: 9781446408278