As reported in 43rumors (GH3 review at Digitalcamerainfo. GH3 and E-PL5 comparison and almost identical IQ. | 43 Rumors) a recent test shows nearly identical results from the GH3 and the E-PL5. Meaning the most probable scenario is them having the same sensor as in the OM-D and just differ in AA filters. Original (translated) link here: Google Translate This goes to show that, for the time being, there is nothing new in terms of sensor-related tech for :43:, after the release of the OM-D. I guess we'll have to wait until later next year for the next step forward concerning sensor performance.