I've found that it can take longer than 15 minutes to get back in the groove. There is certainly something that happens while coding, i.e. "being in the zone".

I've found that it can take longer than 15 minutes to get back in the groove. There is certainly something that happens while coding, i.e. "being in the zone". In my experience, it can take some time to get back to that high productivity, high focus zone. Getting back to a low or medium productivity is easier. Although I agree that just because there's a meeting in the afternoon, it's not like you can't start something big (could also start something small, or chunk up the big task), however, I think the article still has something useful to remind managers, even today.