My husband and I work full time M-F.
I have two children in daycare from 8:30 to 5:15, 5 days a week.
Honestly I think he benefits from the structured program. All of these links you have provided are talking about little 2 year old children. We definitely use choices and consequences and are consistent. His biggest trouble is sleeping (going to bed and taking a nap), he can lay for hours before falling asleep and this is where he generally is "not listening" at school. Not wanting to take a nap, not being still and quiet, etc.
We have talked a lot on how to be the teachers helper and how he can always help by doing what is asked of him. He is very bright, argumentative and always pushing limits