I have not read all of this thread. I just wanted to mention that I have three kids. Each of them fall at a different end of the cut off date.
Our cut off date is December 1st. School starts the first Weds in September.
Our oldest son turned 5 August 6th the year he started Kindergarten. (He had gone to Nursery school and Pre-K as well) Even though he was not the youngest, he was one of the youngest. He has always done well in school, socially and academically. He is in 5th grade now.
Our middle son missed the December 1st cut off. His birthday is 12/21. So, he was one of the oldest when he started Kindergarten.(He also went to Nursery and Pre-K) He turned 6 in Kindergarten when others had just turned 5. He is in 2nd grade now. There is one other child in 2nd grade older then my son. By two weeks. He is a strong student and does really well in school. There is a difference in between DS and some of the other kids but, that is not based on age. Its more on personality. He does get bummed when he hears of other kids his age that are in a grade higher because of the age cut off. But, he understands it. My nephew is one month older then my son and is in 3rd grade. That is a real sore sport with DS...lol. Thankfully, he is in another school district.
Our DD started Pre-K this past September. She turned 4 on October 10th. She is one of the youngest in the entire program. There are only 2 younger then her. We were actually really nervous when she started the program. We had her in Nursery school last school year for about three days before we took her out. She has always been a very shy little girl and would get extremely upset when we dropped her off. (She is our third..we know about the leave right away and not hang out when dropping them off deal
) Two of the days she got so worked up that she threw up as soon as we walked out the door. The teacher and school had tried to talk us into keeping with the program and seeing if she would get over it. DH and I knew she was not ready so we took her out. So many people commented that we should have left her, etc, but we knew it was right for our DD. We even tossed around the idea of holding her out of Pre-K a year. We decided to give that a go and see how things went from there.
Fast forward to this past September. I went in before the class started and explained to the teacher how DD was in Nursery. She had come a long way socially during the summer so we were hopeful things would be better this time.
Her first day went great and every day since has gone wonderfully. She does not like weekends and had a fit when we had two long weeks off for Xmas.
In fact, I had her first Parent/Teacher conference and the first words out of the teachers mouth was that my shy little girl was the "social butterfly of the class". She has made lots of friends and does so easily. She is doing great academically as well. There is really no difference in between DD and the kids that have already turned 5. We are so relieved and know that the little girl that was so not ready for Nursery school will have no problem starting Kindergarten this fall.
Wow..this got long. Sorry. As you can see from our experience with our kids. They are all different. My three kids have three totally different personalities. They all have their strengths and weaknesses. Both in school and out. Not so much because of their age but, because of who they are.