This is a very interesting article, I don't agree with all of it, but I would agree about the mature games thing.
Games that teenagers love (even though they shouldn't be playing them), are not true mature games. Sure, they are rated mature, but there is nothing mature about mindless violence and profanity. A lot of 20-30 year olds play these games as well, but they tend to be adults who are stuck in their childhood.
These same people will dismiss the Mario's or the Pixar films of the world as being childish, because the bright colour scheme scares them.
A truly mature individual would be able to see the widespread appeal in such things, rather than cowering away, clinging to his copy of the 'mature' gamers bible, MW2 or some other mindless shooter...
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