It's high because the ibl image I'm using is a dark grey top facing hemisphere, so I had to increase the intensity for compensation. Similar how in a studio the photographer will concentrate the most light source using the Key light (which in this case is the upper right point light). IBl is fill lighting to remove most of the shadow from key light.

Edit: It's VSS with bagginbill's skin shader handling the gamma correction. Set to 2.2