I think it varies a lot by the user. I think (hope) most people are just joking, but I’m sure we have a number of people who aren’t joking.
But also keep in mind we absolutely have propaganda bots and trolls here. They’re quite good at directing the hivemind, even without the assistance of complete loons.
I live in DFW, a large amalgamation of two cities and a bunch if suburban sprawl in Texas.
I live in a neighborhood that is considered extremely walkable, as I am directly across the street from a university and less than a mile from city hall.
Here are my walking distances:
Straight-line distance to Big Ben: we don’t have a Big Ben, but we killed JFK and that’s 34km away.
Bonus fun fact, I commute 42km each day. This is considered far by most people here, 32km would be much more reasonable.