To this thread: WTF?!
Seriously, it's had the same button layout for the past 15 yrs and it's only 4 buttons. I had a few problems when I first started playing 360 because I kept pressing A instead of X but after a while it just feels natural.
If you're really having trouble with the layout I suggest you play Tekken and learn a character's 10-hit combo. By the end you'll know the button layout and will be able to do QTEs no problem.