Yes, it can be hard to figure out,and you don't have a crystal ball so you don't know how it would go. DD was close to the cut-off and old for her grade, otherwise I would have had more reservations about it. She is now with some kids who are 18+ months older,it is unsettling thinking about high school and her being 16 or 17 surrounded by 18-19 year old boys. And now that she is going into the magnet, I worry about the fact that she will be with kids who are older and also highly gifted...it may be hard for her to keep up. But at the time we accelerated her I had to think about what she needed then, not what MIGHT happen 3 years down the road. I had no idea if she would even have the scores for the magnet.