The point, I believe, was that their laptop battery lasts longer than many people's, with any OS or battery, because they shut it down much more often than most.
There was some discussion about Linux having trouble with battery life while hibernating. That hasn't been a problem for me because I just don't do that.
In my experience, most people like to just leave their computers on, or sleep or hibernate them. Some people specifically like returning to their windows etc. just like they left them.
Erm, both windows and macs can be shut down
Edit: I'm getting downvoted but the way it's phrased I don't understand the issue with shutting down on macs / window. I always shut them down.