Nope. As it turns out, people are less happy when they're mind-wandering no matter what they're doing. For example, people don't really like commuting to work very much.
Nein. Menschen sind unzufriedener, wenn ihre Gedanken abschweifen - ganz egal, was sie gerade tun. Kaum jemand fährt z. B. gerne zur Arbeit.