AMD have actually gained market share recently if i remember correctly.
The key thing is value for money, the fact you can get a quad core circa £50 that can overclock to at least 3.6ghz is astounding, and fanstatic bang for buck.
I have one of thier six cores (ignore the sig

) and i got it for £140!, thats amazing value for money, and i havn't even overclocked it yet.
Yes, performance is important and at the moment intel have the crown undoubtably, but if you compare 980x sales to that of the 1055T or 1090T it's obvious where the most sales lie...
There's also something that people seem to often forget when purchasing hardware, and its that it should be tailored to what the user shall use the PC for. The amount of "spec me" threads where the OP goes and buys an i7 for web browsing, office work and "light gaming" is astounding, and it's just a waste of money!
The truth is that you really don't need anything more than a highly clocked dual core for the majority of applications (gamers will disagree, but haters gonna hate).
Progress in the CPU field will only really be appreciated by encoders and workstation environments in the next few years.
Back OT, Bulldozer is begginning to look more promising, but its value for money will likely still be the "be all and end all" of the new architecture!