No, but the video games are a tool that can be easily used in the process of needing to brush up on getting the feel of the real experience or coming close to it, so people are defending these games in any form that they are in, and that is disturbing.
Content is the key to change of mindset, but if we are not ready to change what we take into our minds these days, then get ready for this stuff to keep getting worse and worse.
Many of those studies say that the content and concept can drill into the game player a definition of power, prestige, importance based on success using violence, all concepts reinforced by Catz' Slate article if you look at it from that perspective.
In Mario Brothers, for instance, the object isn't to kill or destroy things, though that could sometimes be necessary, but the object is to solve the puzzle and get Mario from Point A to Point B. It becomes progressively more difficult to do that, but the one who solves the puzzle does so through creativity and innovation and figuring out how to solve the problems presented. In my opinion, that is a healthy game that reinforces positive concepts of problem solving and success.
Contrast that to a game in which almost the whole concept is to destroy things and people in order to succeed. If you couple that with showing the most violent types on television and in the movies as heroes and the more violent, the more successful and admirable they are, I can see how that might translate thoughts into a young mind that wasn't quite stable. And how he might see himself elevated to hero status, admired by the world through mass violence.