RollingRock,
A child with scores in that range is very likely going to be a candidate for at least one grade skip somewhere down the line. Early Kindergarten entry is often a relatively painless place to make such a "skip". Even going by her "should have been" birthday, she is probably still very close in age to the rest of the entering K class: it isn't like you are talking about radical acceleration for her.
How well does she get along with children in the 5-year-old age range?
What is her play like?
What does she already know?
What is she ready to learn? What grade is that taught in? Will she learn it in Pre-K? In K? In third grade? How does the school handle subject acceleration for children who want to stay with age peers but are ready for higher level academic work? The decision to move her up or keep her back could have implications for how well she will be accommodated academically later on.
Are there Pre-K skills that you feel that she hasn't mastered yet? What things do you believe she will learn by spending another year with children mostly younger than her? What things would she be able to learn by spending that year with children mostly a little older than her?
When you say that you feel she is "a bit young" yet, what specific things are you talking about? How do you think these things will impact her ability to benefit from Kindergarten?
These are the sorts of questions that I would be considering in your shoes.
But I don't think that there is any doubt that a child her age with these scores could absolutely handle the academic demands of kindergarten.
