Let's speed things up a little bit
  1. Busta Rhymes
  2. An auctioneer
  3. The guy from the jimmy johns radio commercials
  4. A hockey play-by-play announcer
  5. Someone from the 40s who regularly talks fast "just to get a word in edgewise"
  6. A tween girl talking to her tween girl friends
    Suggested by @lebron