Is this a deadpan portrait?

There is a genre of photography called deadpan. Often used as documentary to reveal the nature of the subject.

I have an article up as What Is Deadpan Photography?

http://www.dpreview.com/articles/8040898852/what-is-deadpan-photography

It's been discussed over at the Documentary Forum.

http://forums.dpreview.com/forums/post/42585881

Deadpan should be relevant to the portrait guys. Do you think this painting by Grant Wood is intended to be deadpan?

http://upload.wikimedia.org/wikipedia/commons/7/71/Grant_DeVolson_Wood_-_American_Gothic.jpg