[jeffdavis]

"As you decrease the intelligence of the audience, being a good speaker is increasingly a matter of being a good bullshitter."

I don't think intelligence has as much to do with it as whether or not you've convinced the audience to care about the topic. If the audience doesn't care, they will be looking for other ways to pass the time, such as laughing at jokes.

Now, it may have to do with intelligence or it may not. But I believe my perspective is more useful when writing or speaking because it leads to a more obvious solution. Rather than going around looking for smart audiences, you can instead look for audiences that have a reason to care about the topic, and then find the most concise way possible to tell them that reason at the beginning of the essay/talk.

It's also a lot less condescending, quite frankly.