<i>sometimes this attitude comes out in some of the HN comments that it&#x27;s unfair for someone who works 60 hours a week and answers emails at 9 pm to get a promotion over the single mother who walks in the door at 9 am sharp and is pulling out of the parking lot at 5.</i><p>I think the complaint is often more -- judge the actual business impact.  Not shallow shiny measures, such as how long you&#x27;re in the office.<p>Unfortunately, what I tended to see was a lot of ping pong from noon to 5pm, and then work from 5pm to midnight.  Just because your workplace is your fun place, doesn&#x27;t mean you deserve a promotion.