This just is not true. AMD hasn't been relevant since they purchased ATI, which actually used to be a reputable GPU developer. Since the consolidation, AMD has been an absolute disaster, especially with their driver updates. AMD's newest series is certainly better than their previous attempts, but it's still leaps and bounds behind Nvidia. That's just a fact. Nvidia graphics cards are without a doubt more powerful, quieter, and more efficient. The only downside to Nvidia is their graphics cards are more expensive because they are of higher quality. The only reason Sony and Microsoft installed AMD GPUs into their consoles is because Nvidia is too pricey, and AMD was a cheap and affordable alternative to keep the price of the consoles down.
While everyone has their own opinion and certainly their own experiences with various companies...In my experience, I cannot say enough about how much I agree with this statement. Since 1992 when my family purchased our first 486 with a 2 mb ATI card, the RagePro II, then much later I personally purchased a 256 Mb ATI Radeon x850 (2004) and lastly the 256 Mb Radeon x1950 Pro (2006)....The cards themselves were OK (just OK), but they had horrible issues with their optimization/compatibility and the integration of their Drivers through Catalyst Control Centre. The only saving grace was that they (ATI) were a Canadian company (and I wanted to support our Canadian market), and their price/performance was quite decent and several hundred dollars cheaper than anything Nvidia offered. But I will say again, that every single ATI card I ever owned had major issues with Drivers. And in terms of the quality in their manufacturing, I also have to agree that since they were bought out by AMD and began out-sourcing their cards to such companies like Diamond, Sapphire, VisionTek and PowerColour...well, I have tried 4 diffierent cards from those manufacturers and they have all been absolutely garbage. Seizing fans, fusing PCBs, short-circuiting/burning out...and just plain 'under-powered'.
In between those years of blundering through ATI products, I have had several Nvidia-based cards beginning with the 16 MB Voodoo 3 3000 (which was an amazing card, and the best card on the market at the time for performing OpenGL; a predecessor to Directx). Next I had the 32 Mb Matrox Rainbow which was a beast in terms of lifespan. I've also had a 256mb GTX 8800 from PNY, a 512mb GTX 9800+ from MSI, a 1Gig GTX 285 OC from BFG Tech, 2 470s from EVGA, of which the only downer was that they ran qute hot. But none of these nvidia cards ever gave me any serious problems of any kind. (Unless you cant 8 ASUS 570s being RMA'd in 13 months because they stopped working to the point where even the ASUS rep said they were 'not fixable').
In short I will continue to support Nvidia (and especially EVGA) for the rest of my computer-building days
For my next build....I wholly intend on buying EVGA for as many products as I can (Motherboard, Power supply, Video card).