I know that lots of people complain about customs but my experience has been mostly excellent. I usually return from Europe via AMS which arrives relatively early in the afternoon but not always before banks of other flights arrive. In every instance I have been able to get off of the plane and get through mid-field customs with very minimal delays. I have frequently made it through in ten minutes after opening the door. Of course I never check a bag and make sure that I am near the door when selecting a seat.