So I probably am. In DD's year 2 class there are 3 children who have been sent to school a year later on account of being a summer baby.
All 3 children have caused trouble from day 1, especially the oldest lad, who on top of things seems bright.
Aibu to think that this happens a lot, because they are bored and would be better off in the year above?
YABU - the parents know best and this is just a coincidence.
YANBU - this seems to happen a lot and could be a factor.