Pretty debatable with Fenix's A320. However, I'm just talking about how I see on the EIS displays the engine is being started and still at 3-4% N1 (NOT fully started, still in motoring phase) and the whole start up audio portion was already played. Listen to a real A320 neo LEAP 1A start-up and you'll see what I mean. The engines take a decent amount of time to start, same with the 737 Max's LEAP1B's.