Maybe it's just how many people are late for work/appointments they measure. Travel time is less predictable in the city.

But actually I think it's a mix: more dates in peoples lifes, wanting to flee the noise (little joy in transit on foot), false urgency to catch public transit because murphies lets you remember all the times you just so missed the tram, as noted by others: more transit by foot in the city in general because of public transport.