My son turned two late August, and we have decided to wait until next year to do preschool. Most preschools here (NYC) won't take a 2.1 boy, anyway (they prefer 2.4+) for their September intake. Two days a week I work and he's with a babysitter, so he is used to being apart from me, but he is also very attached and for various reasons we've decided to wait. He has two or three weekly play dates with kids his age and slightly older, plus daily visits to a very busy playground, so I'm not worried about the socialisation aspect. He is shy with new kids and adults for five or ten minutes, but then becomes incredibly chatty and lively.
But the preschool programs I've looked into for 3+ tend to be four or five mornings a week (8.30-1). Has anyone else gone from zero preschool to quite a full schedule at three? Was there a longer adjustment period because your child had never been in a drop-off class before?