Keep clicking the guy saying it in that link.  You'll hear it.  Click it over and over.  Don Don Don Don Don Don Don Don
		
		
	 
Wait, I heard it that time.  He's saying Dawn.
		
 
		
	 
He's not.  Your ear is off.  I understand how you can hear him saying "dawn" but he's not.  It's the same o that's in "pot"  ahhhh.  Keep clicking.  Don Don Don Don Don Don Don Don Don Don Don Don
		
 
		
	 
No, I hear it.  I just say Dawn that way, too.  Dawn is the word he's saying with an accent, by the way.  He says it like doe-uhn.  
http://www.thefreedictionary.com/Dawn
Listen to it.  Doe-uhn.  Doe-uhn.  Doe-uhn.  
Totally unnecessary elongation of the syllable with a whiny awwww sound in it. 
Aaron, on the other hand, says Don like Dahhhn, with more of a shortened but still nasal twang to it.  That's every bit as grating, but I understand what he's saying.