I'm sure there's a big gap between I and III. I would posit that there's still a pretty big gap between high I-A and lower I-A. If you went back twenty years ago, it would be a rare season to not see the entire Top 10 in the AVCA in the Sweet 16 of the Tournament, and likely all 8 of the Elite 8. It was such a top heavy game, but at least it has smoothed out a bit, where there are absolutely a lot more than 30 competitive programs and the tournament isn't always 'chalk.'