So, as far as we all know, Goblin Siege is something that is caused by wealth and population. We could be stuck for hours doing a singular attempt. I think with the new update, it's entirely possible to have it happen in a lot less time. With the new world map in Fort mode, we can raid other sides and begin incindiary wars and such, until another culture turns on a Fort and begins attacking back. In my mind, with the right settings we could, theoretically, bring about a Goblin Siege early by abusing this mechanic solely on Goblins. Now I'm not entirely certain this is a guarantee, but I think it's possible. I don't know if it would be survivable early on unless you take the time to custom-fit your drawves to all be incredibly powerful wrestlers or axedwarves and get some really good metal production super early for it, but it's something we should look into.

I'm just gonna bump this, since this is relevant to the strategy that I and Karppa used. The goblins indeed get angry if you harrass them, and if the world is as young as possible the siege is pitifully small. Before they decide to counter-attack, there's plenty of time to set up some good old atom-smashers. Then just bait the goblins in, and pull the lever to win.

I think it might be possible to get it done in under 1 hour, if someone figures out how the goblin's decide to attack you. The time they show up after annoying them with a raid has been incredibly inconsistent.