They misunderstood "one or two-hour lunch anywhere between 1pm to 5pm" for "4-hour lunch from 1pm to 5pm". Same with France, people have a 1-hour lunch either from 12 to 1pm or from 1pm to 2pm, rarely a 2-hour lunch.
Thanks for the feedback. It's more correct to say that traffic drops off for 3-4 hours rather than everyone goes offline for 3-4 hours. It's likely to be staggered based on the slope of the curve at that point.