Fedora was constantly broken, sound broken since f11, other misc breakages once in 1-3 months.
Vista is very stable, one update caused infinite reboot, also found some rendering bugs.
Ubuntu is the best, the worst problem in years was it forgot static IP during upgrade
Snow Leopard seems poorly tested, bundled app from Apple crashes, some settings don't work (still very short experience)
It's just my experience, using all systems for the same tasks, development of Lightsmark. The message is clear: ditch Fedora, get Ubuntu.
Intel is not crazy, they would do the same, but they are not interested in helping AMD/Nvidia GPU sales. So they continue propagating wrong technique.
Research is to see what everybody else has seen, and think what nobody else has thought.