That is exactly my DD's situation.
She probably can handle full-time schooling next year. She already goes to school 8:00 to 1:00 all week and when she comes home, she does her extracurricular activities which are rather demanding and difficult.
We're not doing K next year because of poor academic fit. DD can handle all day of having fun playing but she shouldn't have to sit through hours and hours and inappropriate busy work when she is 5 or be expected to work independently with worksheet isolated from peers. We'd be officially enrolled at a charter school so we'll be able to enter a B & M school next year as a first grader but I'm not sure if that'd going to work for DD.
I wouldn't hold her back a year for maturity reasons and she is very immature in many ways. She is just so goofy, silly, and fun-loving that she tires people around her and goes crazy too often.
