Plus, its an interview. Pros tend to know what questions are coming or should be coming. Its easier to get an idea of what to say in those situations. When you have little idea to what is going to be said, you try and buy sometime to think of an adequate response and make sure your sentences make sense.
I can't fault the kid. I can give a dynomite presentation because I know what needs to be said and I have gone over it several times. Giving interviews is a different animal. You are trying to make sure you are positive in your responses, don't blame your teammates, try to not give too many cliches, provide bulletin board material, and don't **** any one off (coaches, friends, family, fans....) all while trying to sound intelligent. Its a lot more difficult than it seems. Hell, and I only gave my interviews to local media, not state, or national.