I don't really understand blind fanboyism of anything really. When it comes down to PC parts, I'm just trying to get the best deal. Ideally, the best deal on a part that I won't have to RMA.
I've had many video cards from both sides, AMD video cards are not bad. Crossfire has been a lot more forgiving than SLI from my experiences. Performance on AMD's side may not be exceeding Nvidia's when it comes down to flagship vs flagship... But when it comes down to performance, you get a damn good deal for something that isn't far behind.
As for CPU's... I saw AMD exiting that side of the market when they gave up their fab in 2009. However, I believe Global Foundries will catch up to Intel sometime soon, with the recent article I read about Intel and moore's law coming to an end.