Thanks for the heads-up about the new firmware. I just enabled 0-second anti-shock and will give it a try ASAP.
It took me a bit to figure out how to turn this feature on, so .... To enable it on the E-M10, go to Gears menu E and scroll down to Anti-Shock. Turn it on and then scroll down to "0." I'd previously used the 1/8 second anti-shock on my E-PM1 and found that it worked well, so I'm eager to try out the 0-second anti-shock on my new E-M10. I have a MySet for high-speed exposure bracketing, and of course, anti-shock is turned of when I enable that particular MySet.