Micro-presentations (built on the Pecha-Kucha project) help to tame some of the problems with traditional presentations. 20 x 20 (20 slides for 20 seconds each often with automated advance to the next slide) impose limits that can streamline presentations. Still, 20 x 20 is 6.67 minutes. Add to that the inevitable set-up time (even if it's just one person walking up and asking if the microphone is on), and you're knocking on the door of ten minutes.