Unless I'm planning on taking the pitch (first pitch, 3-0 count, maybe 3-1), then yes, my finger is always on the button I'm going to use to swing. I've gotten gradually better at laying off the low and outside curveball, but I used to be horrible at it, and its still hard. For whatever reason, I'm much better at laying off when I'm hitting LH than I am RH, especially vs a RH pitcher. My biggest improvement was switching to just always using the circle button with two strikes, and then I can often fowl off the ones I don't hold back on.