So far, so good. Works well with Fedora 20 (kernel 3.13.6-200). No issues with X11. Screen resolution (2560x1600) acted as expected using a retina display with no need to force it using Resolution Switcher. Also, no issues with Gnome 3 flashing black and blue, but I also have the following environment variables set:
CLUTTER_VBLANK=glx
CLUTTER_PAINT=disable-clipped-redraws:disable-culling
CLUTTER_ENABLE_DIAGNOSTIC=True
CLUTTER_VBLANK=glx
CLUTTER_PAINT=disable-clipped-redraws:disable-culling
CLUTTER_ENABLE_DIAGNOSTIC=True