Are 50% of developers hacking in coffee shops? More likely the people who choose to hack in coffee shops are people who are good at shutting out distractions.

Are 50% of developers hacking in coffee shops? More likely the people who choose to hack in coffee shops are people who are good at shutting out distractions. Or maybe the alternative is worse, e.g. working at home with wife and kids who can't seem to fully comprehend what it means to be working. Maybe they are working on some "light" tasks that don't require deep concentration?