Video Modeling for Children with autism

Hi there.... I have two little boys both affected with autism. I have been using the Watch Me Learn Video modeling dvd collection to help them learn social skills, play skills and how to act appropriately in school and in public. I am wondering if children with autism generally do well with video modeling. I have seen great success with the Watch Me learn video modeling dvd's and was wondering if there are any statistics done with video modeling? Thanks a lot. Denise