Mr. $T$ said:
Because Intel was the first and they are ahead of the game when it comes to image, AMD processors use to be really bad take the K5, and K6 they were not that good at all, and that is kinda where they got the bad rep with the P3's kicking them around, but when the K7 and Athlon hit town the image changed and for a while AMD was really pushing intel like a rag doll, As this happend Intel got smart and relized people buy the MHz not benchmark numbers, and so netburst was born (aka Willy,Northy,Prescott,Teja). I don't care what anybody says but people do buy the MHz and some don't know who AMD is. As a local computer tech AMD is often refered to as that "other processor, you know not the pentium" It is just that AMD is not a well known company and not advertising is really not getting them anywhere. However it seems that AMD is really pushing this 64-bit quiet far and hopefully for us computer buyers is a success.