All the kids I knew in those programs hated it. Last thing they wanted to do after school was more school. They wanted to play games or sports but their parents decided being an A student in elementary school is better than any potential social or physical development.
Western society loves to make every kid "special" either in their challenges or abilities. We seem to forget that every kid IS special, in the sense they are diverse, inconsistent, immature and range dramatically across different types of skills & abilities. If you're a middle-class or higher new parent in the West, let me give you my parenting book for free: chill the fuck out.
