I'm an E-PL7 owner. Bought it as upgrade for my E-PL1 to shoot me and my family easily during events. I'm currently in Japan now, and played around with OM-D models with various lenses on display in a big camera shop (something that doesn't happen back in my home country because the people aren't as civilized). I noticed that when shooting with an OMD-M5 or 10, I'm able to have higher shutter speed (around 300) when shooting in the shop lighting with a 12-40mm f2.8, while I'm getting like 150 shutter speed when I tried the same lens on my E-PL7. I thought the capabilities of the cameras should be roughly the same? Since I was told M5, M10 and ePL7 uses the same sensor, but with ePL7 having a newer processor. Tl;dr does a camera sensor determine the capability of a camera?