Depends on what you order. We found last year that even our 12 year old could clear her plate and that was with a three course DDP. The eggplant could not have been split, the 12 oz steak could have, the pasta my DH had really wouldn't have gone that far, and I forget what my DS had!
The menu has since changed but there was this chicken dish, Chicken Fiorentine, or something that DH and I could have easily split! Spaghetti can be split...everything I've ever gotten there I wasn't able to finish.