When I shared this with my teacher colleagues they all said the same thing: no kidding, we could have told them this a long time ago. In other words, the results agreed with what we all see everyday and what some of us try to fight everyday.
It was good to see the numbers though because some of the admin doesn't see that this is actually what is happening - they just see that there is still growth everywhere, the fact that it is less at the top doesn't seem to click with them. I'll let you know if I hear anything from them about this.