We held DS back. It has been the right decision for us. His teachers advised me to keep him back and as I trusted them,I did. But I always had my doubts. Seeing what other kids were doing confirmed it for me. He lacked interest this year at preschool and we took him to occupational therapy for his fine motor (he's left handed and its caused difficulty). I feel like while it was a really tough year having him home, he is better equipped for school.