Yeah, I know that sounds strange, and I pulled out both my laptops again to make sure I wasn't reversing the percentages after I posted it. It's strange because the jump from about 70-75% on the MBP is huge, and suddenly the MBA looks very dim at 50% compared to the MBP. 70% is comfortable for me, but 75% would be too bright. And the jump from 75-80% is even brighter. It's as if the MBP gets brighter exponentially...I don't have any stats to back this up, they're just my perceptions. Maybe the brightness is spread differently across the MBA, such that even though it's dimmer than the MBP nit-wise, the light is distributed in a way that makes the display seem brighter than it actually is. There is a disclaimer to this, though, as I'm the weirdo around here who enjoys using the MBA at 50% brightness or below, and am known to "love dull images."