Of course fruit is more nutritious than a regular desert for anyone, not just people with diabetes.
Still, because the topic of discussion has been along the lines of accomodating people with different food allergies and recipes for Mudcat Gatherings, I think it's important to point out that for a person with diabetes, sugar is sugar whether it's an apple or a cookie. The apple does contain more nutrients but sugar wise, it will raise blood sugar levels just as much as a cookie.
I think the thoughts here are good ones. I would also like to suggest that if you are having a dinner that is heavy on the carbs (carbs all end up as sugar) and you know that you have person with diabetes coming to dinner, you might want to let them know of the menu ahead of time so they might adjust their insulin accordingly and be able to enjoy the meal with everyone else and not have to worry. :)