I literally just tried dozens of different Linux distros on two different systems.
The laptop with the intel card worked really well with Linux. The laptop with the ATI card couldn't harness the hardware acceleration of the video card, and so stuff like Unity and HD videos were sluggish. Yes, I installed the property drivers, but UVD under Linux is limited. Maybe I missed something, but frankly I was getting tired of going through so many hoops and digging through documentation to exploit my ATI card.