Night Owl and "Early to Bed" POTUS -- Philosophers' Net article

We know that the contrast between Bush and Obama could not be more stark.  But I have just come across a distinction that may trump many of those with which we are already familiar, for example, that Obama has studied history, while Bush has become an object lesson for historians.
As reported in Politico:
Bush famously arrives at the Oval Office by dawn, leaves by 6 p.m. and goes to bed by 10 p.m. Dinners out are as rare as a lunar eclipse.
Obama, by contrast, stays up late. He holds conference calls with senior staff as late as 11 p.m., and often reads and writes past midnight. Ahead of the Democratic National Convention, he spent consecutive nights holed up in a Chicago hotel room, working on his speech until 2 a.m.
Why, you ask, might this be important?  Night owls are often viewed with suspicion by day-timers, the morning people, the early risers, etc.  Base prejudice.  The list of productive night people is long, from Voltaire to Kafka to Winston Churchill.  As a matter of fact,  it seems that the odds of being creative increases if one is a night owl, at least this is what one recent study demonstrates.
Not a morning person? Take solace — new research suggests that “night owls” are more likely to be creative thinkers.
Scientists can’t yet fully explain why evening types appear to be more creative, but they suggest it could be an adaptation to living outside of the norm.
from Philosophers' Net (online magazine) edited by Jeremy Stangroom -- #PhilosophyExp (Twitter)