Greetings from America. I've been here close to a month now, and one thing that shocked the hell out of me was how liberal return policies can be in the U.S. If the guy is from the U.S., it could be a little culture shock, too.
I agree with your reasoning, but if he's used to a more liberal return policy, it sounds like a reasonable complaint. I mean, you should hear me talk about things in the U.S. I have endless little complaints like that!