You had me, up until ...
Also, the picture of his own head on the blog there, which I have snapped for posterity, being so big, is an unconscious signal to his readers that he has a narcissistic personality disorder.
All caricatures have big heads. This is not to say that your analysis of Dan is incorrect or correct, just that your evidence backing up this claim is somewhat misguided IMHO. ;)
The main feature is the head so that is why caricature artists blow heads up and exagerate the features larger than life.