Can I also mention another group of children who give cause for concern?
We have a number of children who have obviously had everything done for them at home - they came to us making no attempt to pull down their own trousers and toilet time and would hand us their coats, without a word, expecting us to just do it for them.
They will do the same at snack-time :simply hold out their fruit and expect someone to come along and peel their banana or satsuma.
They don't ask for help, it's done wordlessly and we are working so hard to teach them these skills.
I think that, in many cases, the parents would be horrified if they realised the effect their parenting has on their children. Lots of these children haven't got the ability to think for themselves or to start using their initiative-simply because they have never had to. Their every need has been anticipated and parents have pre-empted any attempts to 'do it myself'.
Now, I have to say that this isn't the case with all of our children, and we are well aware that some of our new children are barely 3 and therefore still acquiring these skills. We don't expect miracles 
However, we have 4 year olds, and rising 4's who are behind developmentally, purely because they haven't had the opportunity to learn for themselves, to make mistakes and to just 'try'.
Personally, I worry a lot about these children. I also feel sorry for them, because they are in for a hell of a shock when they come into a preschool setting and realise that we aren't going to pamper them.