I've noticed streamers repeatedly farming inferno goblins. At first I just thought it was because it was faster than doing butcher runs, but I'm wondering now if goblins in early act 1 would drop loot at the same item level or better than butcher. Also would goblins drop more recipes or gems?
The thing is most of these streamers you are watching are probably on Hardcore Mode. Goblins are not a speed thing at all.In no way are the items dropped from a goblin any different than items dropped from any other mob in that Act. A 5 stack Nephalim Valor killing many packs would easily net more gold and items than goblins. This is just a SAFE strategy used to minimize chance of death while gearing up. Act 1 had the cellar that was normally filled with normal creatures and a goblin or an Elite or Rare pack. Act 2 has a goblin right before you cross the bridge to Alcarnus. Here there can be a few cultists,fallen, and bugs but nothing too scary as well as plenty of areas to trap a goblin against a wall.