My daughter goes to Ayrlawn and loves it! To me, the snacks seem fairly standard. They aren't exactly the healthiest, but they aren't the worst either. It makes sense that you want your child to only be exposed to healthy foods. But once he/she enters school full time, it's sort of hard to control that. I saw the lunch menus at some of these public schools and it's amazing how unhealthy they are. Even though I will pack my DD's lunch everyday, I know she's going to want what everyone else has.
I've been very impressed with Arylawn in general. The teachers are great and there are a lot of programs available to the kids (gymnastics, soccer, ballet, etc). I think it's definitely worth you taking a visit. Talk to the teachers and the director; visit the classrooms. Don't let the snack thing deter you too much!