One of the author's (more interesting) premises is that individuals with mild forms of autism like Aspberger's, who came to typify the sorts of personalities drawn to tech in the early years, may be able to effectively work excessive hours, but ordinary individuals will experience diminished quality of work, just like everyone else.
CEOs and directors aren't primarily "knowledge workers", they are networkers/connectors/presenters. It isn't the same sort of concentration as programming or accounts payable.
Read this fascinating history of the 40-hour workweek and its demise: http://www.salon.com/2012/03/14/bring_back_the_40_hour_work_...
One of the author's (more interesting) premises is that individuals with mild forms of autism like Aspberger's, who came to typify the sorts of personalities drawn to tech in the early years, may be able to effectively work excessive hours, but ordinary individuals will experience diminished quality of work, just like everyone else.