Seriously though; Intel has been into the FOSS movement as a commercial supporter thereof for a decade or more. ATI tepidly stepped in with a small team of less than 10 people about 5 years ago. Intel supports ALL of their hardware on Linux with very few exceptions (e.g. when they license someone else's IP and that someone won't let them share any details in open code, like PowerlessVR Screwageneration Technologies). They invest heavily in development for the Linux kernel and userspace tools like powertop.
If you ever had any doubt about the true king of FOSS support, erase that doubt now. Intel is the hardware support king of FOSS.
I dual boot. I keep my monitors plugged into the Z77 motherboard. My Ivy Bridge 3770K plus the LucidLogix Virtu MVP chip lets me use my Radeon HD7970 for performance gaming without moving my monitor cables, on Windows. On Linux I just reboot and it uses the Ivy Bridge graphics. Performance is truly stellar (for Linux). Blows away anything anyone else has ever done with Mesa, in the entire history of Mesa. Absolutely obliterates it. r600g and nouveau don't even come remotely close.