Interesting.
DD would have preferred more academic challenge in kindergarten. However, I know she would have much preferred to play with the many toys they had in the room, or play outside, or read books, or do arts-and-crafts, than sit and listen to the teacher go over the alphabet for the Nth time. Because at least she would have been exercising her imagination and social skills.
Formal academics (in my mind, at least) usually involves sitting still, being quiet, and listening for longer periods of time. Five year olds are often not ready for this. They need to move and talk and explore, not sit and listen all day.
