OMG...tell me thiis guy is wrong about micro four thirds

I just grab my 5d and 85mm when I want a full body portrait with good isolation, because it's better for that purpose.

Yes, but the DoF is thin enough there that you need to stop down even with the 4/3 if you want to get the ears decently sharp. The differences are between hair-thin and razor-thin.

But of course people love comparing 35mm with 85mm f/1.8 with E-M5 with f/6.3 kit lens, and when they can't get decent portraiture with f/5.6 or f/6.3 on 4/3 they don't realize it's not 4/3 that's the problem.