The garrison gathering seems to be some psychological trap that makes people think that they have to do it because it's *right there* !You don't have many alts, do you? With 7 90+ chars, it takes me almost 2h to do the full rounds of the garrisons, and that's without doing any daily quest/dungeon/whatever. Just gathering, picking work orders, and resubmitting missions (which is the least part of it).
Would you spend an hour farming ores with your characters normally ? If not, why would you do it just because it's in 14 3 minute chunks ? ;p