during one clock cycle of my floortop's cpu, light travels about the length of my forearm. and you thought light was fast.
synchronizing all parts of a processor core with one clock is a stupid idea anyway, if boasting new frequency numbers is not your main goal.
which it might well be. while the outcomes of more sophisticated approaches to measure cpu power, like MIPS, are instantly recognized as being bogus, GHz, as a measuremend category, are so absolutely simple, that no customer would think of them as complete nonsense.

"my box is faster; while during one of your G4's clock cycles, light travels about the length of your forearm, during one my P4's clock cycles, it only travels about the length of my penis."