Herve, I missed your post back in July but I am shocked that someone hasn't asked you to take it down. They've been crazy about this, signs all over campus are wrapped and covered to avoid it getting out.
As for my thoughts, I would've gone with a serifed font. It would make it look a little more serious and "academic" if you ask me. And I understand the desire to have George facing to the right, or the "future" if you ask the external relations department, but I don't think I would've hidden half of his face.