plus you cant compare two different CPU's just by their clock speed. You are comparing a ARM Cortex A8 with Qualcomm and just because it has similar clock speed, the Cortex A8 can out perform the Qualcomm in every way since its more powerful

Why do you thing that the Nexus One is only "slightly" faster than the Droid while being 400mhz faster? (450mhz if you count the underclock of the Droid) And the HD2 is yet to destroy the iPhone 3GS?

There is more to CPU's than just mhz