I know it has been awhile, but I just stumbled on this goldmine today and wanted to share, because it's AWESOME! Mark McDonnell is posting tutorials and samples of gesture drawing instruction done instructing artists at The Walt Disney Company and more.. and he's posting it on Youtube!
His website is http://cre8tivemarks.com/ and he has a group on Facebook that you can follow if you're interested. It's called Fans of Mark McDonnell's The Art And Feel Of Making It Real. Anyways, I feel incredibly inspired and want to go draw now...so, Enjoy!