I don't think it's a useful comparison for any sub-60 minute commute when it's a passive mode of transportation vs active.

When I lived in Manhattan, I had a ~35 minute commute by subway. I read a book every week or two, and it was far more productive than anything that happens in a 20 minute drive by car. My commute now is roughly 20 minutes, driving... and it's very stressful.

Beyond 1 hour, the time lost has greater impact on your life (socializing, household chores, family time, etc). Even still, I'd rather 90 minutes in a train than 60 behind the wheel.