Based on various stories that popped up due to this blog post I'm starting to suspect either Joel has an Autopen or an intern that does nothing but sign his nam

Based on various stories that popped up due to this blog post I'm starting to suspect either Joel has an Autopen or an intern that does nothing but sign his name on things. Could he really be signing letters sent out in "stacks"? One would assume that many more schools than just Penn State got such stacks. And then on top of that he's sending out hundreds of these hand-signed letters to top members of all the different new SE sites? Even if he isn't really signing each personally, there's still a good message here, but I'm now curious as to whether or not he's really signing all that stuff.