It is better to wait until the message has been delivered before judging. Allowing personal characteristics of the speaker or his poor delivery to prevent understanding. A prominent attorney was once questioning me in his client's lawsuit. On this occasion I should have been acutely alert in my own speech and hearing. However, he had only combed the very front part of his hair that day, and the rest of his head looked like a rat's nest.
Some speakers can deliver what they have to say with charm, wit, and charisma.
Audiences may love it, but they haven't herd anything of importance. Others can speak with convincing sounding authority but may have false messages. Some very dull speakers may have concepts of real importance to communicate, but they are lost on those who turn them off. It is an essential part of good listening to discern the differences. It would be most helpful if speakers would analyze their audiences, determine clearly the message, not get distracted by digressions or details which may be interesting to them but not to the audience, and present their material clearly.