I have argued against an overly dense build at the start, and still favor a spread out approach. In response to Eyrei's description of "Blue Dot City", I understand his concept, and could support it as a "suburb". I have done that once before also, actually, when I built my capital then found the coastline two tiles away
Think of Rome and Ostia, or Los Angeles and Long Beach?
I was more concerned that it would become a guiding principle, especially since we hadn't seen much of the map yet, and I think that is the reasoning behind this poll, do we want a generally dense inner core, or more spread out. Obviously, in either case, there will be exceptions to the rule due to terrain, strategic situation, resources, etc.
Given the rough terrain around our capital, I think we should be hesitant about building too many cities too close. Yes, they can only reach a certain size anyway, based on the food supply, but that means that we will use up a lot of our "optimal" number of cities in non-optimal locations, and the end result will be higher corruption later. The main prerequisite for early expansion, settler production, is more dependent on the food supply, which is unaffected by corruption. I say find sites that will build settlers quickly, even if they are a little spread out. If it takes longer to found the city initially, but it can build the settlers faster, it is worth the wait. We can always fill in later, when we can use better government and technology to make the terrain a little more hospitable.