Nondisabled students grow in their commitment to their own moral and ethical principles and become advocates for their disabled friends. For example, Cary's classmates became very vocal about making sure that she wasn't pulled out of the class unnecessarily. Developing these strong personal principles will benefit students throughout adulthood. Comfort level with people who are different. I know that.
Parents notice the difference in their children, too.
An interesting side effect is that these parents report that they feel more comfortable with people with disabilities because of their children's experiences. Surprisingly, many of the techniques you're already using contribute to these results. Create a classroom that fosters kindness, consideration, empathy, concern, and care for others. Hold class meetings in which students can express themselves and their perceptions of how things are going. Use cooperative learning.