So, anyone else finding coin victory to be one of the best contenders?
Properly optimised, we're seeing this win within 11-12 turns quite easily and largely regardless of race.
Part of the tech involves upgrading military and part of the 'coin quests' involve winning combats, so it's not exactly a weak combatant either.
Seems that Tech builds have little chance once you start facing opponents that are optimising builds... you pretty much need to be stealing tech to have any chance, since you can't get past the 1-tech-per-turn limit. Culture gives the coins a run, but seems to get just cut short.