Now, I don't want to pick points but the first post is rather steriotypical. I've encountered plenty younger members of the game who can put in the quality of time needed to play the game in earnest and still have a life outside of the game. There's nothing to say that a teen has any less free time on their hands than any adult. In fact I would say they have much more.
Then there's always anti-social people like myself who keeps their groups of friends down to a bare minimum. That's not to say I have no life, it's just to say that I prefer to spend my time in the company of a few and more often than not at home.
Now we go onto the speed of the world. The original poster suggested that a younger member of the game may find the slower worlds rather tedious which is, well, another steriotype. A younger person is not necessarily more impatient than an adult, I certainly wasn't when I was younger, so really that comment is quite baseless. Of course there are some that do find it tedious but I could count many more older gamers here that feel exactly the same. Impatience is a matter of personality not age.