This is pretty true, though I don't agree with it 100% I still think it's almost spot on. I would have to say that the best (High End) gaming GPU is still the AMD R9 290. Since most of them come with a OC already on it and as long as you are somewhat tech savvy, you can furthermore OC the GPU.
Some of the top reasons I would go with the AMD R9 290 agian are...
FreeSync *This will be later in the year but is still great*, Mantle *It's already great and getting better*, TureAudio, Crossfire gives a true performance boost unlike you know... and the price is right. I don't feel as if I'm getting ripped off.
Just look at the 780's and the prices of them.
If you want a good single GPU setup go with the 290 or 290X if you have the extra cash. The 290X is only around a few frames per second faster in most games.
Nvidia needs to come down in price before I am going to pay almost $600 for a GPU like the 980. It's a good GPU but not for the price. I run all of my games at 2560x1440 and have no issues with low FPS. And I often stream to twitch as well...
I know there will always be debates about this stuff but you can't be a fanboy or you will end up paying to much money and turn into a hater!, It's not worth it.
Anyway, thats just a allot of fact's and my opinion.