Karla vent away... sometimes it's just good to get it out there, IYKWIM. It sounds like you've got a lot to process at the moment.

My DD repeated (she did preschool, then did prep as the system changed here in Qld). Yes she is older than her classmates, but it has significantly narrowed the "gap" between her learning ability and theirs. I struggled with the decision at the time, it was a very hard one to make. But now, in hindsight, I think the benefits of increasing her language skills and OT skills (which caused a corresponding increase in her self-confidence) far outweigh the age difference concerns I may have had. She is also a bit taller than the other kids in her class.

I think you have to weigh it all up... does she need the extra time to work on speech/language and OT? Both of those skills are essential to learning as they progress up the grades. Even maths is affected by language (from Grade 3 they need to read and comprehend written problems).

All the best, and try not to second guess yourself once you have made a decision. You're her Mum and you'll be acting in her best interests. And above all else, remember to celebrate her for the unique little person she is (learning ability does NOT equal success)