Memory controllers(atleast the SOC(chip) level ones) are normally developed by the silicon vendor - like Nvidia, Broadcomm, Qualcomm, Samsung, TI, Freescale etc. Not ARM. And these companies have been working on it for many years. They have had graphics, video acceleration, display, camera-interface IPs all integrated into one SOC for almost a decade now. Intel is infact relatively new to this kind of integration.

In anycase everything including memory controllers, pipelining and superscalar has already been taken into account in this benchmark.

What has been left out is higher clocks and hyperthreading. Two things that ARM doesnt have yet.