Cyan if your putting systems into companies and want the least risk of a comeback then most belt n braces types would of course fit the Intel.
But we are talking best bang for the buck for Gaming.
AMD XP cpu's kick butt big time with Intel, slower clock speeds yes, but better chip design overcomes that.
Why do more people buy Intel ?
Cos they are brain dead sheep generally

Follow the big advertising budget no matter what blatant lies they spew forth at times

95% of people believe that MHZ rating is the only rating to think about when buying a computer or CPU, its only the likes of us who generally appreciate the differences.
Basically saying that Intel is better because they sell more units is errmmm false,misleading,untrue,crap,misrepresentation and err just plain wrong.