[SWTXBelle]

My eldest daughter was reading at 3 (taught herself, really) and at 5 was reading at a 1st grade level. Her birthday is Dec. 9. When I talked to the headmaster at the private school she was to attend, he asked if I wanted her to go to college at 17. Good point, I thought. She might be ready then, she might not. So I didn't enroll her at 4.
She went to a wonderful pre-school, read tons of books, and went to kindergarten months shy of 6. She did great - and all things considered, I'm glad I didn't "push". I think you need to ask yourself what is going to benefit your child on all fronts - not just scholastic.
As an aside, she has been home schooled since 6th grade, and her ACT score is in the top 5%. She is actually a very mature young lady - more than ready for college (though I'm not, necessarily!) and I think the extra year out of the system benefited her. That said, it's a call for a parent to make with input from the school, I think.