My DC is 2.5 years old and started nursery at 9 months. The nursery is large and has more than one room per age group, including a preschool room.
She has always been on the slower end of the normal range for physical development. She spent 9 months in the baby room until she was walking, then 8 months in the young toddler room until she became a confident walker and could communicate basic needs well. She then went to an older toddler room where they have lots more independence and this was a big transition for her, one that still causes a lot of upset at drop off (she loved her previous room so it has been hard).
However, after only 5 months, they want to move her again to a different older toddler room (I gather it has some subtle differences like older 2 year olds who can talk more, more independent etc). As she is summer-born, we assumed she would stay in her current room until moving up to preschool in September.
Does this sound reasonable? She will have had 3 moves in a year by September. This feels like a lot of transitions in a short space of time and I worry how she will cope.