Every lawyer in the USA that I've ever worked with also bills in 6 minute increments. Which means every email is 6 minutes. Every phone call is at least 6 minutes. etc.
Isn't this better though? The alternative being that every email or phone call is an hour, or that they batch it up based on gut feel. If I get a phone call that could easily steal 6 minutes of focus time (note that I specify focus time, even if the call is only 30 seconds you'd have to mentally switch tasks back and forth).
I’m not sure that 6 minutes is a useful denomination of focus time. Maybe legal work is too different from IT and it makes sense there, but when I need to focus on something, 15 minutes is the smallest amount I would allocate for a task.
