Not sure why private supports pretend that the issue is widespread and not centralized. In the 3A-5A ranks, It is a huge advantage for some schools. To pretend like public schools are blowing smoke is simply crazy. Now if a 6A or higher public school whine about losing to a private opponent, I will point to most of the comments in this thread in reference to developing a better program.
I don't pretend that at all. I've long said that the anti private resentment is strongest among the small and medium sized public schools that make up a majority of the IHSA membership. I've also long said that the IHSA shot itself in the foot when it went to 8 classes. All that move did was create more medium sized classes (and titles to win), and that played right into the private school wheelhouse in terms of where most of the strongest private football programs reside. Remember, Driscoll didn't go on its title run until 2001, the first year of class expansion. If we were to go back to 6 classes and keep the discriminatory multiplier, I think you would find that private schools would likely still dominate 4A and 5A but not as much as they did before expansion. Remember, the multiplier didn't come about until 2004.
SInce 2001 when the IHSA went to 8 classes, there have been 45 titles awarded in 3A through 5A. Of those 45, 27 (60%) have been won by private schools. While that is certainly more than their representative share of the overall IHSA membership, I would point out that during that same time frame, the other 18 titles won by public schools were split between just ten public schools. Clearly, several of those public schools won more than their representative share as well.