If it's regulated, then it's not private.
The regulation on private schools will be the results.
Despite all the angst over standardized tests, they do say something significant about what has been learned. A 99 percentile on the SAT or ACT speaks volumes about the ability of that test taker.
Likewise, private college graduates competing on graduate tests for graduate programs says something significant.
I love standardized tests.
The 99th percentile kids aren't what worries me. It's the kids of the bottom 25th percentile. They got dealt a bad hand to start with; compulsory schooling is one thing that prevents them from being totally neglected.