In Civ 4, production, gold, research, culture were all added when you END turn. (if a wonder said 1 turn left, you would always get it).
In Civ 5 vanilla, all the numbers are added at the start of your turn...
So if the game says golden age (1) turn, I expect to get the 500 gold that is displayed.
Instead I only get 200 or 300 gold (since the golden age is over).
This is also applied to production, what you though was 1 turn away, can turn into an extra turn.
Is this the same case for the expansions?