I was there, you did a fine job. Inspiring, everyone liked it. Yes, you were there to drive enthusiasm for your mission, it's not cynical to note that, and it's naive to be dissapointed by it.
YC served Domino's in NYC? I lived there most of my life, swear I never even knew one existed.
If this was downtown (Tribeca/Soho), John's would have been the choice. Talk to them a couple days in advance, I'm sure they could handle it. If not, go to 3 or 4 places and get a variety. Just not Domino's.
For what it's worth I agree. It just sounds like the OP couldn't find anything big to complain about, so picked on Paul's style rather than the substance of his talk.
EDIT: removed silly domino's in NYC joke