I don't disagree, I'm just pointing out that geography magnifies the early riser problem. Schedules set by early risers in the east in a timezone are "twice" as early for late risers in the west of that timezone. When the sun of your city is always 45-minutes to an hour behind the city that "leads" business in your timezone, even some of their late-risers start to look like early-risers with respect to sunlight hours.