[GeorgeTirebiter]

Indeed. "They have revealed that night owls are generally brighter and wealthier than those able to get up early in the morning." Source:

http://www.dailymail.co.uk/sciencetech/article-2298354/Early...

[arg01]

While I don't disagree The correlation between a higher income and having a more flexible schedule to allow you to keep to the night-owl schedule is easily explained on the job traits front rather than the personal traits front.