"Cycling is like a piece of magic: It only has advantages,” said Ms. van Hooijdonk . (who never cycled into gale force winds in freezing cold and rain ;'D... wtf)
He also has the chance to be fit enough to bike regularly and to live in a place where it's feasible to do a lot of trips on bike, with shorter distances than what you'd find in the US
Granted the Dutch climate has little extremes but even at -5 degC and snow or 0 degC and rain, you will still see many people on their bikes with rain suits and gloves.