I don't think the default controls for controller helps to break out of ice at all. So what I did was use Joytokey (PC software that lets you use keyboard keys from your controller) to create an "ice break" button on my controller. If I push and hold down on my left analog stick (L3 button on PS3 controller), it is turbo WASD. It works great.
And while we are on the subject, if you configure it properly, controller is superior to keyboard for playing PSO in general.