I have no idea what the guys do at our camp, I think it's just instant. I'm rarely still in the camp by the time they haul their lazy butts out of the fart sack..HaHa.
Kicked the habit many years ago, so don't drink it out of necessity, but will have a decaf if we're out for a social breakfast.
My mentor got me on to making up a thermos of hot 'Ice Tea' mix for hunting. Sure is nice when your in the stand for 1/2 Day come Dec...