I too find that after a 10-hour day, I can not do anything productive. My best time is morning till early afternoon. I think ego depletion definitely has some anecdotal evidence. Most of us can only do quality focused work when our mind is clear after sleep.
If you look at the data gwern provided, some of the supposedly owls actually sleep till noon, and do work immediately after waking up. That is not an "owl" in my opinion ... I too can do work at night if I spend the day wandering around. An owl is someone who could pump good work after a taxing day.
If you look at the data gwern provided, some of the supposedly owls actually sleep till noon, and do work immediately after waking up. That is not an "owl" in my opinion ... I too can do work at night if I spend the day wandering around. An owl is someone who could pump good work after a taxing day.