Wanna take a bet on that? Find me someone how never used a mouse and someone how only used a controler so far, give the contoler only user a controler and the never mouse - user a mouse and let them play the same fps game vs each other, mousy shoud win.
heh, that could be rather doubtfull, my dad for one, when he sits on to play an FPS on a mouse/keyboard(he gets that urge every few months), he just goes around aiming at the floor half the time. My brother keeps pointing to him on the screen where is the general direction of the enemy, and we keep having to remind him ctrl can make his guy crouch.
Your dad is probably like my dad, from the Doom age where they didn't have to look up and down
Also my Dad get's dizzy from playing FPS, but then again he is in the Army so I dont think he has a need for playing FPS
That's why he sticks to racing games.