When will new aircraft data be released to older game worlds?

As title, anyone have any idea? I know this will depend on the response in Quimby but how long will it take? 1-2 weeks? 1 month or longer?

According to Matth in about 1-2 weeks.

Yes, target is to collect initial feedback from the players and feed that into some final fine tuning before we release it to the existing worlds.That should be possible within 2 weeks.

So once the data is loaded into older game worlds, let's say if I operate an A321, it will reflect the new changes right away in terms of fuel burn and other characteristics?

Yes that is the plan.