The funniest thing is that Jobs said that the processor is dual core, and that it's 2x faster. Now this seems to imply that 2x cores = 2x faster, which is absurd, if they didn't increase the clock speed there is no way they could get a definite 2x speed up.

The problem with multiply cores is that they have to access memory among other shared resources which really hurts when one core blocks out the other one. Modern operating systems try to be smart about multiply cores, but still twice the core count does not mean twice the speed.