I don't think that it's that men waste more time than women, because women have a lot of things to do more than mens, by example, she has to do breakfast, she has put makeup on her face and some colors on her eyes, she has to do more and most dificult things that a men.
And about young people I think it is true that those people waste more time than old people couse they have more energy and more ability to do wherever they want and the old peoble don't.