I've never tried it, but I recall seeing an occasional mention of someone joining their starting worker to the capital city instead of performing worker actions. It occurred to me (too late) in a recent start that I could have had my first settler out at turn 10 if I had done so. I wouldn't expect that joining the starting worker would usually be a good idea, but I bet there are sometimes it would be a good strategy, particularly in a start with no food bonuses and a couple of BGs or other 2f/1s tiles around. After a few searches I wasn't able to find discussion of this, but I seem to recall an SG or HOF game where somebody started this way. Does anyone have links to a game or discussion where this was tried?