64 K to 512 MB is 8192 times more not 1000 times more. 4 MHz to 1 GHz is 250 times more not 300 times more. Please consult a calculator before spouting off mathematical comparisons.
4 MHz to 1 GHz is 250x but the A5 is dual core so 500x - amdahl's share. But yeah, innumeracy is a societal problem.