response time

[Brul(tm)]

is it ok? (i have no engine modifications).

That's normal behavior :!:

From how many rpm does your Q4 begin to push hard?

Mine starts just before the 3000rpm...
3" exhaust from the cats, 1 silencer (last one) and a combi-prom from Squadra tuning does the trick .

A bigger exhaust pipe diameter in a straight line and leaving two of the three silencers away does the trick 8) Turbo spools much much earlier

Greetings,
Marc