Most of the smooth talkers you see on tv and youtube have basically learned what they are going to say. They sound slicker, but eventually what they do say is less interesting because it has been pre-learned and thus pre-filtered.

This is a general problem with Television and popular culture nowadays. If you look at old tv talk shows you can see real spontaneity, but this is mostly absent from modern tv. Of course, the other side of the coin is that on modern TV interviewers and interviewees are much smoother and more self assured, as they already know what they are going to say.

I really hope that people do not get spoiled by this pre-learned smoothness of presentation as to fail to appreciate actual spontaneous interviews and conversations.