Hi M.,
I'm glad you asked this question because i went through a similar situation and found a lot of negativity surrounds this issue. Children are all so different. While a lot of moms recognize how advanced their kids are in different areas, not every child could handle skipping kindergarten. But, some can. You may find, like me, that some of the people you mention this to will show their concern that you may be anxious to put your child ahead simply because you recognize that you have a very bright child. That's not all there is to the issue and it sounds like you are fully aware of that.I'll share my story and maybe what I'm trying to say will make more sense.
My eldest daughter turned 5 in May the year she was to start kindergarten. She had always been ahead of her years and just before kindergarten, she started reading fluently on her own. Everything I knew about kindergarten (I used to work in schools), seemed far too immature for her. Prior to the first day of school, I had a meeting with the teacher and principal. They advised me to let her start kindergarten and see what happens. They allowed her to attend first grade for reading and spelling and it soon became apparent that she was developmentally far more like a first grader than a kindergartener and, by Christmas, we all decided that it was best that she skipped up and stayed in first grade full time.
She is now 9 and in 5th grade and still at the top of her class. She prefers older kids as the younger ones, even many of the 5th graders, she finds annoying with their naturally less mature behaviors. There is no way I could see that she could have stayed in the grade her age alone dictated. I am very pleased the school worked with us and we found the right path for her.
The school later admitted to me that many parents come to them telling them how wonderful and bright their children are. Many parents get their ego gratified in this way, or, like you and I, are seriously concerned about what is best for our children and recognize they are different. The school does not want to put someone ahead and have them forever struggle. I believe what my school did was wise and fair to see how it would go.
I also found other parents very negative at first too. It was like they thought I felt my daughter was superior to their child by pursuing this route. I got strange reactions. I think now, though, they fully understand that she just belonged in a different place that was more suited to her and we recognized that early on.
I am actually glad my daughter, while she probably didn't need it, got that kindergarten experience even if it was for such a short time. She did learn some things so it wasn't a total waste of time. It was a nice way to ease into school. The one area that she may not have been ready for first grade had she started in the fall is the stamina. By Christmas, she had grown in that area and was able to handle the harder, longer days in first grade. I think it would have been a huge struggle for her to stay awake, focused and at her peak those first few months.
Please feel free to contact me if you'd like to discuss this further. May you find the right path for your precious son!
Good luck with your son. I hope you find the right path for him. You probably know better what is best for him.