Unfortunately this isn't the case. On my server, playing empire side, I'd say it's a 50/50 split between people who say "left" based on spawn orientation, and those who say it based on map directions. Of the people who say it based on spawn, about 10 percent say it backwards because they have republic mains. Regardless, 100% of them are *********** idiots.
Here's a common scenario in civil war:
Idiot: INC LEFT
Idiot team: *Half go east, other half go west, mid left undefended if I'm not there*
Me: *leave warzone*
Judging by the amount of stupid replies in this thread, people here lose alot of warzones.