J.L.
My son started day care at 2.9 months. He's a very physically active child, but is a good listener, would sit still for stories at home, played independently, helped clean up at home, all good things. Loves to run, jump, climb, dance and generally be in motion. He started in a Toddler 2 room and had a great time and positive report from the teachers. When he switched to the Preschool 1 room, every day that I picked him up (he went 3 x per week) the teacher would sigh as she would recount that he didn't eat his lunch, had a hard time sitting still, would not sit for story time, etc. We had none of those problems in the Toddler 2 room. It turns out that his energy level was higher than most of the kids in the preschool room, and the teacher liked lower energy kids, so my son was often seen as "difficult". I dreaded picking him up and hearing the teacher's sigh. I began to refer to her as "the woman with no joy". We moved to Western Mass, and he began preschool at the YMCA and miraculously, my son is back to eating lunch and snacks, sits for story time and is a good listener. It turns out that the energy level of the group of kids is higher and they are happy that he fits into the higher energy level as some of the kids in the class are more withdrawn and have a hard time with the constant motion.
I learned that its important to find a place that fits with your child's temperament. I also think that once a teacher labels a child as problematic, they tend to pay more attention to those behaviors and not notice all of the good things the child does. Its hard for a child to be in an environment where the caregiver has a negative reaction.
Just my 2 cents worth....