Great work there Scouse Gits. This very comprehensive testing (to say the least) has certainly shed light on some of the matters we were previously wondering about. Very interesting and entertaining as well.
I just have to ask if you in fact tested 84 starts with each of the 21 civs to make the total of 1764 - or if you tested more times with some of the civs and fewer with others? I'm guessing you used the first approach, right?
Again, very helpful the way you do your homework!