Shortages of Intel processors is the main reason, I'd say. And also because Intel has the brand recognition to be able to price their processors that way.
konichiwa, how is the fact that AMD has clocklocked their processors a downside to going with AMD? Intel's processors are clocklocked also, so it's not a donwside for AMD buyers at all. It just erases a previous adavntage for AMD, they used to be able to overclock via multiplier setting.