Someone who hears a story for the first time needs to create the whole picture in her head from scratch. Give background, introduction, examples, then bring it all together.
People who have heard the story millions of times before, check your presentation against their existing mental picture. Summary upfront, neatly structured, logical.
Presentation designers fall in the second category, while most of your audience is in the first. Think about that.
Art: Gustav Klimt, Beech Grove