I am not a morning person either. Others in my family rise and shine before the sun. It may depend from person to person, and certainly technology exerts a huge influence on our daily rhythm, maybe despite our natural rhythm, which is influenced by daylight. I also see enough people who can operate at 100% with 4-5 hours of sleep in 24 hours. Unfortunately I can't do it without 7-8.
Yeah I'm on 4-5 these days....But I enjoy my 7-8 LOL I miss it...