...I think the question about:
I think if you increase the number it slows down the research
Im not sure though
I found the answer in one of the references above here:
http://modiki.apolyton.net/index.php?title=GameSpeedInfo
it is not the same file... but I think if you check all the XML files related to construction/build/research/growth...
they are all similar in number defintions...
the best way to find out...
1)
a) play the vanilla version
b) research a tech (noting the turn cost amount)
c) exit game
2) edit the CIV4erasinfo.xml (COPY NOT ORIGINAL)
a)change the industrial/modern starts to a large or smaller number (vastly different than the vanilla version)
<iResearchPercent>
100</iResearchPercent>
like using
25 or
500 as a number!
b) restart game and research same tech in 1b)
c) note the turns cost amount
and there you have your answer
hope that helps