The Mythical Man Month was way before his time! (Age: 49 Started in technology at 18, Avionics for 3 years, then IT) Those are the things us geezers know about and the kids don't. We have all learned from mistakes, both ours and others. The kids think every thing that comes to mind is new and brilliant, we have seen most of it before. Like these new fancy functional programing languages, like Lisp.
BTW, did nobody explain that the older you get the less sleep you need?
http://news.discovery.com/human/adults-sleep-age.html so the whole working longer hours is off base. We don't need to work longer hours because we work smarter. We handle small problems while they are still small.