Meeting his parents?

I've been going on regular dates with this great guy for about a month. We have not established yet that we are exclusive, I want to take it slow and get to know each other for a long while first. His parents flew into town last night and today he asked if I'd go to dinner with them. When I expressed a slight hesitation, he said it's not a big deal, he only sees his parents about once a year, so he wants me to meet them because he doesn't know when there would be another opportunity. Is this too soon and too much? Especially because we are not exclusive. Or is this a good sign he wants me to meet his folks and I am being silly?
Thoughts please (: