Also, the managers who sign off and make the final decision on which office plan to go with tend to spend most of their own work time meeting and talking to peo

Also, the managers who sign off and make the final decision on which office plan to go with tend to spend most of their own work time meeting and talking to people, rather than needing to sit and concentrate on something for several hours. I expect this influences a cognitive bias when these managers consider the productivity level of an open plan office.