Airbus nose gear - Typically how long in air after main gear touchdown?

[Hodd]

Thanks, so using the A330 as an example:

You Tube

I count 15 seconds between the main landing gear touching down and the nose gear doing likewise. Would this be considered a long time?


If there's no guidance available, fair enough. We'll delay the unwanted alert by an arbitrary duration, but it's always nice to have some rationale and point of reference.