Perhaps some of the problems are caused by hidden SEN. Boys are more prone to dyslexia, dyspraxia, etc, which are also likely to be on spectrum so only the more severe cases will be picked up. Students requiring exam concessions (reader, scribe, laptop) will be mainly boys.
DS is also computer/gaming obsessed but he's just written a great GCSE S&L assessment on artificial intelligence that goes way over my head. He's also dyslexic which means poor spelling and illegible writing. One piece of coursework was Manga based and included traps to trick the reader.... definitely not a criteria featured on the mark scheme so he may well do very badly in it.
I saw the Destiny (computer game) "companion app" yesterday and was really impressed with the descriptive language used.
I would recommend a book called "Everything bad is good for you" which attacks the myth that gaming is bad. en.wikipedia.org/wiki/Everything_Bad_Is_Good_for_You