beginning game strategy: It looks like it's going to take 40 turns to get city no 1 up to size 3 instead of 25 in civII. The worker is going to have done something like 8 roads and 3 irrigations in that time, inventions set on 60% will presumably be nearing Monarchy anyway (if your city is on/by a river with roads, trade going to science is about 120 in total= quite a few advances right at the start/well by this 1st stage after 40 turns anyway ). On a grassland site growth from then on is going to be fantastic, with extra food at 5 or 6 per turn because of the irrigation. Have a few defensive units for happiness up to size 5 or 6 and build settlers who can move onto road + irrigated land from the hard-working worker and it will have 4, then 5 extra food, getting to size 3 in approx 18 turns, faster than in civII (if you irrigate in civII you're wasting settler time, here the worker's already done it - if you don't, size 3 takes 25 turns as above).
Also, a good grassland city of size 4 or 5 with a granary would be able to grow by 2 in size almost faster than settler production could keep up (assuming 40 resources and only 8 turns or so).
I now imagine that expansion will be so fast after a certain point if you want it to be so, that my strategy of closely-packed city-building will pay off after all. except that cities could almost get too big too quickly. Build temples for happiness up to size 5 to 8 (depending on city troops) and to get culture per city above 10, and city-overlap will quickly cause competition for resources. I'll be building workers and settlers just to keep the population down!!:crazyeyes
My civII beginning strategy is normally also this so that I can have lots of cities producing caravans for quick wonder-building in the capital, although my capital is only producing about 5 extra resources itself. In civIII, with land-forming so fast so soon, I'll be on 12 extra in the capital no problem (no unit upkeep drain + more wood squares worked without food probs), so wonder-building won't be slowed that much by not having caravans in civIII. I'll probably build others in parallel in other cities and still have loads of extra resources from the non-caravan-building cities. Spreading wonders will be better for city culture points anyway!!!
Blimey, sorry everyone, I'm getting carried away. It's a real shame I can't do any testing for the game - cos I'd go through civ for civ and work out the best strategy for all civs on all map sizes on all continent types with different neighbours.
4 weeks to go