It's important not to forget this statement:

The game is currently paced to be a 225 turn game, and is optimally played at that length.All this information is still being kept in .txt files.
From this we can assume quite a few things, though it's dangerous to assume of course. Firstly the word "currently" implies that this aspect was far from finalised at the time of writing. Secondly "paced" leads us to believe that the game would be best played, that is to say optimally played, over 225 turns. The third point is the reference to .txt files which hints at some or all aspects of the turns being moddable. The issue of generals, aging 1 year every two turns however is another confusing point. If CA are trying to move away from any kind of timeline, then why do generals, age at all? 225 turns give 112.5 years of agents/generals lifetime. This is less than two generations of generals and royalty, over a period ranging from the early 11th century through to the discovery of the americas...