From what you have told us, I would say go for it. My son was so excited to go to kindergarten. But after two weeks he was bored out of his mind and wanted to go to first grade. They have tried pull outs and differentiation in the classroom, but that is only, at best, a couple of hours a day. The rest of the day everything is so beneath his level. This lack of challenge, when he was so excited to get challenge, has resulted in underperformance and lack of initiative.