The speed of electricity isn't 1/100th the speed of light. IIRC it's something closer to 70% in copper. The speed electrons move is much lower, however something more like cm or m per second (presumably depends on voltage.) However, this isn't related to the speed of electricity which is analogous to how the speed of water through an (already full) hose isn't related to how soon water starts coming out the end when the tap is turned on.
I've also heard, but I can't explain so you'll have to look it up yourself, that none of this matters when keeping a grid in sync anyway. It just works out.
I've also heard, but I can't explain so you'll have to look it up yourself, that none of this matters when keeping a grid in sync anyway. It just works out.