I went to a model shoot event, brought my E-M5, GX7 and 5D Mark II. I used 75/1.8 lens on GX7, later switched it onto E-M5. Let me say fortunately I switched it onto E-M5. In the similar lighting condition, with aroung 1/100s to 1/250s speed, most of the GX7 shots were out of focus due to the IBIS, while E-M5 shots with IBIS were mostly in focus. I used electronic shutter on GX7, so there was no shutter shock. However, this is purely just my experience, maybe the way I hold GX7 caused the IBIS conflict. It just didn't work for me. Disable the GX7 IBIS, I can get sharp pictures as long as the shutter speed is fast enough. I am not saying GX7 is bad, I still love it and use it...with IBIS off. Anyway, here are some shots with GX7 in that event.