Not at all uncommon for upper-middle class school districts in the mid-West. Think "Chicago suburbs with $500k average houses." I went to one. Great school; fits same rough statistical profile.
Then you have e.g. Chicago Public Schools, which range from comparable at the very top end to "not particularly inspiring" to "attending this school is of comparable danger to being deployed to a war zone."
Then you have e.g. Chicago Public Schools, which range from comparable at the very top end to "not particularly inspiring" to "attending this school is of comparable danger to being deployed to a war zone."