Ahah good catch reading and replying about the post with the video game comment in it, I missed that sentence somehow, As far as the gaming thing goes, in my opinion. The shooter fast paced games that require twitch reflexes I would think possibly to an extent could teach the brain expect instant gratification. Games where it is all about shooting up the enemy and do not require a lot of thought to get through, just killing all the enemies along the way could be that way. Also another note to the shooter games, when walking around a level. Sometimes there is slow times in the game where not a lot of action is happening then you come to an area where there is intense action. So the brain could be taught to start thinking that way. For example if nothing exciting or intense is happening the brain is kinda off task per say. But as soon as the intense action hits the brain tunes in 100%. So possibly this short intense bursts of attention to the action can end up mimicking the adhd distractibility. Or the kids who can sit there and play for hours on end could represent the hyperfocus. Leading the person to pseudo add. so it is tough to differentiate.

Thinking back on it. when I played games even world of warcraft. WoW was not always an instant gratification. It did make you think when you were questing. Since you did not know where anything was when starting out so had to read the quest book etc to get clues. It was not here is where you go and have fun with it move onto the next area. When I started losing interest in the game is when I started remembering where things were and it became kinda boring after awhile having made so many characters. I lost interest because there really was no challenge any more. so it can work either way though.