See, people like this cause constructive discussion to fail. Be it because they just got into PC gaming recently, only started researching recently or flat out choosing to ignore history.
Zephyr, are you seemingly forgetting the HD 7xxx series beating Nvidia in both performance and price? Are you forgetting the proverbial curb stomping of the HD 5xxx vs 4xx era? I fail to see how the idea of each company trading blows every other generation somehow lends itself to "AMD as a whole slowly dying".
Let's also not forget how just this LAST GENERATION the 290x was all but tied with the 780 Ti: http://www.anandtech.com/bench/product/1438?vs=1441
Hell, if you really want to get down to it, the only clear win Nvidia has had in the last 5 or 6 years was 5xx. AMD had more wins in said time period with 5xxx and 7xxx, and pretty much pulled off a tie in this last generation of 7xx vs 2xx.