In the USA at least. On my flight from Japan to Taiwan I arrived at Haneda about an hour before my flight, spent 10 minutes total at security including screening time, walked through an automated immigration gate with no wait, had a soba, then boarded.

I timed my time from plane door to train in Taiwan: 24 minutes. To be fair I was hustling and had no checked bag. Automated immigration gate, walk through customs without being stopped, straight to the train. The train comes every 10-15 minutes so I also got lucky boarding right before the doors closed. My time from plane to home was about an hour and a half.