My productivity is 50% above expectations. I also tend to take fewer breaks in comparison to my colleagues (I'm looking after a baby, so I do hav to stop our "clock" as I do t know how long any of the interruptions will be, but then I use those breaks to go to the toilet, coffee, etc..)
And I'm not saying work 35 hours in 25...
More like working 40 in 35. Productivity will still be above expectations. My partner thinks it's not great but I also know that if I were in the office I wouldn't be fully focused the whole 7 hours (and that's expected anyways).