Kirsten was a late premature baby at 36 weeks but was small at that age. Do what you feel is right for you. When she was in preschool and prek, she did not participate and was extremely shy. What we found when they tested her in K was that she had actually picked up everything. She just didn't express it! She started K already having it completed. This was a girl that the preschool teacher told me would have special needs. Yes you read that right. We have excellent schools here. When they tested her, they tested her in a way that fit her needs and she aced it. When she started kindegarden, they taught her in the way that she needed to be taught. They developed a program for her and two other kids to follow that fit THEIR needs. I think she really blossomed and caught up with other kids as far as gross motor skills, etc around 3rd grade. Now she fits in perfectly. She is 11 1/2. She carries a 98 grade point average. She won the presidental gold award this year and it is for students that carry a 95 or above grade point average during 4th and 5th grade. She is in the ACE program (similar to gifted and talented), is a leader among her classmates, dances 4 classes a week (really helps with those gross motor skills), will be student teaching dance in the fall, plays the violin beautifully.
You need to evaluate her for her. You need to follow your gut instinct. For me, I thought that preschool teacher and director were CRAZY. Yes she had gross motor issues. Yes she was small. Yes she did not participate. I knew she would be fine in kindegarden. She has been excelling ever since. Sometimes our kids surprise us.