C.S.
Hi L.,
It is actually a State of Florida rule, not related to Broward County. When you look at kindergarten, virtually all of the accredited private schools follow the age 5 by 9/1 rule as well, they have to for their accreditation.
That being said, my son has been with the 3 year old class since last August even though he turned 3 in April 09. His school is going to put him with the "young VPK"s for 09-10 and then if he is there next year, he will be in the "Old VPK"s for 10-11. I will be paying for the "young VPK" this year - the same as if he were still in preschool.
We are in downtown Ft. Lauderdale at First United Methodist Preschool. I think they are doing a great job of addressing this issue, regardless of the restraints.
Good luck! C.