In his excellent and interesting book, The Outliers, Malcolm Gladwell posits that those individuals who achieve brilliance in what they do – examples being Bill Gates, Tiger Woods, Michael Jordan, to name a few – expend in the area of 10,000 hours of practice to achieve the mastery of their given pursuits. (A fascinating book and highly recommended.)
Which is a segue into this YouTube video featuring some musicians who have obviously put in their 10,000 hours.
Thanks to Instapundit for the link.