Tourney: WHBPC 2011: Seattle 08-11.09.2011

from same web page

"West to East. Our bodies have a natural 25-hour Circadian rhythm. This is why it's easy to stay up and extra hour at night, and hard to go to bed an hour earlier. So staying up an hour extra is easy, which is what you get when you travel west. But going to bed and getting up an hour earlier is harder, which is what you get when you travel east."

i have found this to be true. it's always easier going to the states from europe than coming home.