All the practice in private cannot beat the lesson learned in front of a live audience. It doesn't have to be a paying audience either. I am a little dismayed at some comments which seem to be based on ' research ' as though that is the be all and end all. Over the years 'research' in many different fields has been found to be slightly mis interpreted/represented and can be clouded by the individual. No doubt there are some academics out there who can comment!!