27.6 minutes sounds absurdly low to me. Getting ready at home, getting in the car, parking it at the destination, and finally walking to my desk takes at least 10 minutes for me. Discounting the overhead doesn't make sense.

Also need to know volatility of the commute time. I would be interested in the range of the commute 95% of the time, rather than the quickest commute in ideal conditions, which is how I bet most responded.

Getting ready at home doesn't take any longer if you're WFH or going to the office. Gotta shower and wear pants either way.

My old commute was 12 mile and consistently <30 minutes each way.

My current commute is a 1 mile walk that takes <20 minute. Def. lucked into this - my wife's commute is more typical at 10 miles/20-30 minutes.

My dad's old commute was 5 miles/15 minutes. Mom's was similar.

Of my friends, 2 commute downtown (Flex Time/hybrid) for .gov positions. I can't think of any that commute more than 30 minutes each direction.

Edit - I'll add that almost all of us could take jobs downtown for more money. And either deal with the commute or move into more expensive housing closer in. It's a balance. We're lucky to be in a position to make that balance. But, just about any software developer is going to have that option (except perhaps in SV).