There are two places where you can try to tell the system to have faster animations...
Game options has a 1x, 2x, 3x setting which appears to do nothing.
In battle there's a 1x, 2x, 5x setting which works, and is remembered from battle to battle until you exit, but it goes back to 1x when you start the game.
I'd like the options setting to work, and set a default speed. 2nd-best would be to have the in-battle setting remembered after exit and restart.