It really depends who you are talking to Coach. Some very much believe this to be the case. Grossman's whole one book is about this type of thing.... If you believe the video game blamers, I would say yes.
Grossman was a video game blamer.... seems playing video games must be the best way to get the proper mindset as you don't have to endanger anyone else in the process (well, whole villages may be wiped out in the violent aftermath, but the training process is safer). I prefer Super Mario Bros.
-rvb