It's articles like this that keep me reading the escapist. You touch on an important point - the struggle for gamers - the well-adjusted amongst us who do not lurk in parents' basements - to reconcile our love for gaming with the anathema that is the gamer stereotype.
I have a friend who has convinced himself that he is no longer a "gamer", but merely a person who amongst other things, plays games. It's absurd, of course, because this same fellow also collects game posters, game toys, reads game websites, listens to game podcasts, and maintains his own gaming website. But what his example demonstrates is how the obsessed few have co-opted the gamer image. Maybe the image was theirs from the beginning, but now I'd like to think that the demographics have changed considerably.
Was it just a matter of maturing? I don't think so, because I think maturity and interest in gaming are mutually exclusive. That they're associated with one another is just another part of the stigma against games and gaming - invariably by people who have never played games, or people like my friend who have become disillusioned with "gaming culture".
Articles here on the escapist, and blogs like your TokenMinorities, show how adults can interface with gaming in the same way as any other art form - thoroughly, critically, analytically - and not necessarily with any obsessive bent. In the end, your thesis is dead-on. While the first generation of serious gamers has "grown up" - it is time for the industry to do the same, all the while still leaving the door open for the next generation.