It goes even deeper than that. They layout of the circuits at the transister/component level have to deal with this too. Take a look at a motherboard between

It goes even deeper than that. They layout of the circuits at the transister/component level have to deal with this too. Take a look at a motherboard between the cpu and the memory slots, you'll see traces that make weird turns and then back onto them selves. All to make sure the signals end up arriving at the same time (well, as close as is manageable).