You can’t hurry these things.
Meanwhile, another gaff from the Civilization IV manual. This is under several entries in the Advanced Rules section.
Construction Speed Halved
Of course, it should be “Construction Time Halved” or “Construction Speed Doubled”. But if you look at the section on Wonders, you’ll find “Production time halved by:” or “Production cost halved by:”. But both phrases have the same meaning (namely, the latter), and thus I stumble across another inconsistency.
Quite a few times on the Q3W LEM forum, newbies learning to use gtkradiant have been advised to RTFM, but it seems that we should be giving Firaxis this advice, too.