Both min and max? Don't they call that average? In my opinion the 99th percentile is most important and what causes stutters in games. Basically the time it takes for a video card to render a frame, so the lower the better. TechReport is known for this and called out AMD when they noticed really bad micro stutters in their games. But AMD has since fixed it and is doing pretty good in that area.
According to this benchmark the 290 and 280x do pretty good in that department in FarCry 4. Same goes for DOTA2, Civilization, and Alien Isolation. Borderlands: The Pre-Sequel clearly hates AMD but that's because it's a Gameworks game.
Not saying that the 970 and 960 didn't do extremely well in those benchmarks, but notice how many cards do higher average frame rates over the 960 but had much higher 99th percentile. But consistently the 280x and 290 outperform the 960 in both percentile and average frame rate. For MMO's though it makes little to no difference what GPU brand you buy. Does WoW like Nvidia? Yes, but you won't get a nigher frame rate over AMD where it counts, in raids. Cause running around the world getting 144 fps is pointless. Unless Nvidia steps in to Gameworks the hell out of WoW, it makes no difference. If they do, people who raid on AMD will rage quit and cancel subscriptions.