I've been playing D&D and other rolyplaying games (World of Darkness, the Serenity RPG, I LARPed in a game called Ampgard, played different MUDs including Achaea and Dune3, roleplayed in EVE, WoW, and EQ, all to lesser extents) for about 6 or 7 years now. I've seen all kinds in those experiences. People who truly have lost touch with some points in reality, people who barely roleplayed at all and ONLY played for the nitty gritty aspect of D&D (power-gamers, all.) And I've seen those who are very ballanced in their roleplay and their approach to the nitty gritty.
And I've realized something over time: yes... D&D does ATTRACT people who WANT to lose touch with reality, but not everyone who plays D&D has. And those people who DO play in order to escape reality do so because of underlying problems in their lives, not because of the game.
As for the attack on LARPers, etc... I find it hilarious. What are actors? What is a war-game? It's just silly to say that if you pretend to be anything you're not then you must have a weak personality.