A question on maps and turn times

[Conqueror Worm]

Which do you think would have faster turn times, a huge earth map with 22 civs and 40 city states or a giant earth map with 22 civs and no city states?

Also, what if I started all the civs in the old world, and left the new world empty except for city states, do you think that might help much with the turn times?

Thanks.

P.S. - Spent several hours searching for a huge Eurasia/Africa cutdown of the Ghenkis Khai giant earth map, or something similar, but was disappointed to find nothing whatsoever even after all of these years. One map in Ynaemp came close, but it cut off most of Europe and all of Russia, so it didn't quite work for me.