Would a delayed European war begin with mature jets?

Would delaying the European war give Germany operational jet aircraft in meaningful numbers?

Yes, but Britain would also advance its jet program and might enter the war with comparable or second-generation fighters.

Britain was developing jet engines and the Gloster Meteor during the same period, so Germany would not benefit alone from a delayed war. British planners might accept a practical fighter while German policy pursued a fighter-bomber. Germany could field the more advanced first design, but Britain might enter service earlier or respond quickly with an improved aircraft. If the European war slipped into the mid-1940s, both sides could be approaching a second generation of jets. The result depends on development priorities as much as on the calendar.