So far he hasn't seemed as bad as I was worried he would be, agree with kvn above he feels about as disruptive as say a Iceman hitting an unlucky card.
I remember my father bringing home Wolfenstein and being blown away.
More modern playing WoW as my first MMO was mindboggling - I couldn't believe how big and seamless the world was as well as seeing all the RTS games in a 3d world.