I see on average about 15-20 comedy shows a year so I have seen the gamut of performers. I can say without a doubt that DAG is truly talented and one of the best I've seen. His jokes were all timely, he had plenty of crowd interaction (including directly with me on several occasions), drew from his personal life, and his mixture of comedy, facial expressions, intonation, and singing literally had me laughing so hard that my stomach hurt and tears were streaming down my cheeks.
His opening act was also VERY funny and would be somebody that I would go see if he was headlinging a show- THAT good.
I bought tickets for myself and 3 friends and all of us agreed that it was one of the funniest people we've ever seen. Do yourself a favor and go see this show.