I think that depend of people's personality. The average can be like survey made, but no all young people, eldest people, men or womens are the same behaviours. Wasting time depend of actives or passives personalities, of decided or indecisive temperament, also if the people are shy or extrovert.
My opinion is that eldest people think young people waste more time and the other way round and the mens and womens too, forever think diferent of your behaviours