It feels like Blizzard doesn't respect your time.
Here is my experience thus far: Run across the map, kill basic enemies with too much health, receive a quest, sell some gear, run across the map, kill basic enemies with too much health, collect some gear, enter the dungeon, kill more enemies with too much health, keep running, kill more enemies with too much health, keep running, fight boss that keeps summoning minions, get mediocre gear, teleport back to quest giver location, discover quest giver went to another location you haven't discovered, sell some gear, keep running, kill more enemies with too much health, keep running, kill a horde of bats, see someone riding a horse, (can't wait to get a horse.. oh you don't get a horse until act 4...) locate quest giver, congrats you completed one quest.
I've tried this with a Druid, Rogue, and Necro.