As the husband of someone who has worked for thirty years in education, I used to go to my youngest's Open Nights and ask if she was happy, and bonding with her classmates, and enjoying school, because at that age, that is all I wanted for her, so i ignored the rest.
Education has never been left to settle, it is contantly altered and modified to impress parents and voters who know very little about it at all - again I put my hand up as one of them.
Try not to worry about your little one's progress - they all develop at different rates, but this is not the age to be concerned. Let her enjoy school at her own pace, ignore who much quicker or slower other children are, don;t worry, and enjoy her childhood.
You'll both be glad you did.