[sontek]

I disagree with this assumption. I work at organizations that have follow the sun coverage so we ended up having engineers in all timezones even though the majority of engineers are in the USA.

One common thing I've noticed over the years is APAC is always the most productive timezone from an engineering aspect because they don't overlap with the disruptive/time consuming meetings.

They get the most focus time out of any of the timezones.