An interesting article at The Escapist about Civilization and some of the goings-on behind the scenes at Firaxis:
http://www.escapistmagazine.com/arti...s-Civ-V-Studio
I have a lot of problems with the methods Firaxis tested this with. Turning off barbs, limiting AI expansion ... those are two critical factors for how big an impact waiting to found your first city will be.
I myself like to move the other unit first, see if there's a good spot to move the Settler to in a couple of turns or less. A river hill is is hard to pass up moving to. The extra production from the hill will pay off the first move very quickly.
How about you? In what circumstances do you feel moving the Settler is a good idea?...