Took my new-to-me EM5 out for a spin in a retirement today - Used the EM5 and Pana 35-100 (I LOVE this lens, so awesome!) and onboard flash, and also had a D800 with Sigma ART 35 and Yongnuo 560...the D800 felt like a freaking brick (love the IQ though).
EM5 didn't do half-bad though ;0)
I still need to dial in my JPG settings, though - had to resort to the RAWs.
You know, funny thing is, on those two above shots, I was JUST NOW thinking "damn, I wish I'd had my D800 for the higher resolution" and then I remembered the E-M5 Mark II.