Kind of interesting. I have to admit, over the past several years, the more I've looked at/thought about plus-minus, the less skeptical I've become.
I'm no longer surprised that I tend to agree with what it bears out in this adjusted format in the link:
Offensive and defensive rating are a team's points per game and points allowed per game, only they're both adjusted to account for pace, allowing you to use these numbers to fairly compare all 30 teams, regardless of how fast/slow their tempos are from one another.
Here, we're seeing the Pacers' Off and Def ratings while each individual player is on or off the floor.