Tried the X-E1 yesterday with the starter kit and found the shot to shot speed rather slow. Noticed a delay I wasn't expecting after pressing the shutter button to when the system actually took the picture. Not sure if this is due to the AF or something else.
I think there's a auto preview feature that's turned on by default that you might have to turn off. I don't have an X-E1 yet but I think that slows down shot to shot performance.