All these things you mention fall into the "nervous" catagory for me. Pressure is trying to make a living with your clubs or when failure to make the cut means you may lose your PGA Tour card. Right now, Wie has nothing to feel pressure about. She's playing on sponsors exemptions and special invitations (Woman's US Open). No one expects her to win, and if she plays poorly she moves on to the next tournament on her schedule. Pressure enters the picture when she is expected to win, or must play well to earn a living. Until then, she doesn't know pressure.