With the announcement of the NVidia GTX 1080 and GTX 1070, maybe it'll soon be time I switched from my AMD 7870.
Not that the AMD is a bad card at all (it's been fine for me), but if switching to NVidia is what it takes to load quicker, then NVidia it is.
Note: Have already lowered the 3D settings, etc. . . (on my 4770K CPU with 32G of RAM).