Adjust turning speed for 3rd Person Character?

I've changed my Input sensitivity and tried fiddling with the player controller, but nothing seems to work. What is the variable to adjust for turning speed?

After a few days of fiddling, I've discovered that the X Sensitivity input is what adjusts the speed. The problem was performance related. In a build of the game, the rotation speed was perfectly normal, but with the Scene view it was very sluggish.