They aren't bunched together.
For one conference to be 2 whole points ahead of the 2nd place conference is quite a bit and the SEC falls another whole point behind. That's not bunched together. The Big-10 falls a few points back and then the smaller conferences show up after that.
The ACC is the real joke, for sure.
All of this refers to this year only, of course.
Last year, the SEC was the dominant Conference.