This has been my experience as well. Along with the open office space that is highly distracting. Working in an isolated room at home for an office, I can spend 8 hours and not get distracted at my physical location. Its not like I need to deal with someone next to me on a daily basis talking loudly "HEY JIM YOU WATCH THE GAME LAST NIGHT?!?!"The key is, mandatory vs optional. Your mileage may vary.
My commute time turns into more meeting time and increased productivity.
Working in the office was 0800 to 1700, plus at least half hour each way.
Working from home now is 0700 to 1800 if not later. In additional to that, meeting during lunch time become a daily occurrence. Perhaps we shall all come back into the office to reduce the work hours.
There are people on this site that severely advocate the "watercooler talk" but in a large workspace half your day is pretty much gone by distractions running into people in the hall, bathroom, break room, going to your desk, people next to you being loud and more. I have been stopped in the hall 8 times in one day for 15 minutes each time just talking about real life stuff and NOT work. All that time now is spent on my actual work tasks and I feel less pressured and less stressed because others are not taking up a lot of my time away from my own workload.