I use the dual sticks because it completes the total console experience! I usually use swipe to look for other games.
tilt Tilt is the most accurate and swift for quick zombie- slaying. The touch controls (both) are hard to use, and feel awkward, unlike the console version. No controls are "original console" controls, so tilt is the best choice to go.
I use the default mainly because: I HATE TILT CONTROLS. By the way, for the people who use the dual stick control, the touch screen controls are not swipe controls. It uses a floating joystick, meaning that wherever you put your finger is the joystick's "dead zone."
After playing it on the consoles, I think I'm just used to the Dual Stick the most. That, and the fact that the other two just feel really weird to me. Thank God they included dual stick.
