Just to include another aspect into the discussion: when flooring the pedal, how many milliseconds does it take for the 1M's N54 engine before the 50Nm overboost kicks in (raising torque from 450Nm to 500Nm). Could that extra oomph/push kicking in contribute to the
impression of some sort of small 'lag' ?
Relationship between force F, torque τ, linear momentum p, and angular momentum L