Many of the best hotel bars serve mixed nuts(sans peanuts). Good to see you use a serving spoon, I wish more places would. The Ritz and the Four Seasons don't, but they'll give you a fresh bowl if you ask.
I think that you have to take the source into consideration. I don't know your friend, but when I think of times that I have heard people make comments such as this it is generally not from the most "classy" of individual. Pretentious maybe, but not who I would consider with class.
I agree with the earlier sentiment that what was truly "unclassy" was this guy receiving your hospitality and making a comment about it.
Ok, thanks for the reality check everyone. I did pretty much chalk it up to him having one of his 'odd' moments, but for some reason, it did trigger a little neurotic second-guessing. Not that I'm a beluga and foie gras type of guy anyway.
And thanks for participating in the stupid/whimsical poll.