Where is the line?

I had an interesting first date last night, that temporarily left me wondering where the line is between "no real connection" and "too picky/stuck up bitch." My date was very nice, respectful, honest (or seems to be...), and accepting (again, or seemed to be), all of the things that are on my Must Haves list. However, I left something off the list and I felt guilty last night for thinking this...Intelligence, or insight, or ability to have an intellectual conversation. He may not be "dumb" per say, but I think we think very differently about things and we find different things intellectually stimulating (I'm so diplomatic, aren't I?). And let me also say this: I totally would have dated him in my 20's, but not at 37. Here is the exchange that pretty much sealed the deal for me:

Him: So, tell me about your trip to Portugal. Is it as under-developed as S. America (he had just returned from a trip there).
Me: In some parts, yes. There are some areas where I would not be the least bit surprised to see a local riding to donkey to get around. But in other areas it's built up and developed. I also think that in some ways they are ahead of the game. Like, using wind power and federally legalizing gay marriage.
Him: Oh they legalized gay marriage?
Me: Yeah, a few months ago.
Him: Wow, I didn't realize there were gay people in Portugal.
Me: There are. (while in my head going: *BLINK*blink*blink*blink*)

Like I said, he is a very nice guy and maybe I am a stuck up b***, but he is not a good match for me.

He emailed me about an hour ago to say he didn't really feel a connection and didn't think that I was interested in him either. I do feel a little bad that it was that obvious, BUT I am glad that he took the time to email, I give him a lot of points for that.