Their GPU's and drivers aren't the problem, Both work fine and are very competitive, The problem is their CPU's and the people spreading a metric butt ton of misinformation around.
The amount of times lately I've seen people on various forums and even on Facebook complaining that the AMD card they DON'T own will suck up 900W of power and run at 95'c and is 50% less powerful than anything Nvidia has is frighteningly high and the worst part is a lot of newcomers to the PC market listen to them hence sales go down again.
Hehe, me being one of them, even though I'm not being considered as "new" in your eyes, but my knowledge has slipped, my memory is fainting a lot these days and I feel like a newbie more and more, over and over again, which isn't fun

... But I do.
I can say that I've had my Sapphire 6950 since Juni 2012, as my teacher got it for me and I never had any issues with it at all, solid straight through and took everything I threw at it, loved it.
Although, before I got the 970 as I was upgrading my CPU from an i7 2600K to an i7 4790K and I thought about a GPU as well. The 970 was horrid in coil whine, then got the Sapphire R9 290X, which probably was a faulty one has it was running damn hot, and then a 980 that I returned cause of personal reasons.
Then the Titan X came out, way to expensive, but very appealing, and lastly the 980Ti came out... quite pricey, but very powerful and thought that this card will be my card for the next few years. Specially since they reference coolers are better and much sexier than AMDs unfortunately.
I'm not an Nvidia fan boy, nor AMD. I'm no fan boy at all... In my personal view, there are likes and dislikes about everything. And in my case, it just happen to be a matter of availability at the time and price to perfomance (which 980Ti ain't).
At the end of the day, I'm with Dicey on this one... I don't like all the hate and missleading information and fuzz about AMD. They've made and still do great GPUs, so it's unfortunate to see this. Despite me being an 980Ti owner now.