er... what? all of the most productive people I know are terrible at timekeeping and sleeping at a reasonable time. the 'good' ones at timekeeping amongst them are routinely 15 minutes late, and they won't go to bed in general until past 12.
there may be some kind of sampling bias... my experience of people who do get in early to work hard - rather than stay late, with few exceptions (two otoh), is that they are not especially productive people anyway...
there may be some kind of sampling bias... my experience of people who do get in early to work hard - rather than stay late, with few exceptions (two otoh), is that they are not especially productive people anyway...