Mining and Herbalism respawn rates, and loot tables.
These have an insane respawn rate and are everywhere. My friend is level 10 and he has 100+ copper ore, and wasn't even grinding for them. Seems as though the nodes are respawning after about 1 minute. Also we noticed that the same white common items were dropping in very large quantities from some mobs, getting 10+ of the same white common cloth gloves after killing some mobs. Hopefully this stuff is patched as it could ruin the economy later on.