If you're looking for opinions, here's mine:
Court ordered college tuition is, IMO, totally unconstitutional and discriminatory. You can't force unmarried or divorced parents to pay for post-secondary education without forcing married parents to do the same.
As for support, that is a different matter. I do not agree with states that require support payments beyond 18, basically for the same reason. Eighteen is the age of majority and one is considered an adult and required to support themselves, so why require child support when they are not considered 'minors' anymore? Here in IA, the only mention of it is that a child must maintain a certain grade point average in order to continue support and the support goes directly to the child, not the custodial parent, regardless of where the child lives (dorm, apt., or parent's home).
In DH's case, he brought up in court the fact that BM had a rich uncle who started trust funds for his nieces and nephews' college educations, so it is written in their order that those funds must be used first before either parent would have to contribute. But the wording is so vague that the only definitive wording is the trust fund to be used.....it will be very tough for the BM to get the rest of it enforced. SS has 2 1/2 years left, so I guess we will see then, but I think DH will stand on the side of unconstitutional. We've grilled it into both DS's and SS's heads that they will have to come up with their own college funding (which DS is paying for right now) with loans, grants, scholarships, or whatever they can come up with.