I think regardless of where you work there is an upper limit in time you actually are productive during a day and it is way way below 8 hours. Usually I do more

I think regardless of where you work there is an upper limit in time you actually are productive during a day and it is way way below 8 hours. Usually I do more in the first 2 hours of my shift than I do during the remaining 6 hours. Others might be more productive at different time of day depending on their own internal clock. We just can't be 100% focused on hour work and uninterrupted for so many hours. Also since commute time is not accounted for in your work time, this is a moot point. You don't work more because you don't commute. You just have more free time to do stuff out of work.