Comment by iteria
For tech hubs? Because tech hubs tend to be in some of the most traffic nightmare cities. I have worked in DC and Atlanta. My commute for all my jobs except 1 was an hour. The one exception was 20mins because it was a small weirdly placed company that just happened to be in the suburb one over from me.
For all other jobs, I had to commute to a business district I didn't live close to because business district and low price (when young) or great schools (when older) don't mix often.
Yeah, I know the median commute in these areas is low, but they are counting retail workers and teachers. I bet the median for tech workers is pretty high because of the reality of how they tend to be placed.
In a real tech hub, it's definitely going to be a longer commute. Nashville, for instance, is not a tech hub. Yet it has some of the worst commute times for people who have an office there.