Yesterday, I was shooting with my OM-D E-M5, using various lenses. At one point I had the camera set to High-speed Continuous shooting and I found that (using the exact same shutter speed, same aperture setting, same lighting conditions, same ISO and same memory card) the speed of the continuous shooting was noticably slower when using my Panasonic 100-300 lens than with my other lenses (such as the Oly 12-50 kit lens). IBIS was on in both cases and OIS was off on the Panny 100-300. It's hard to quantify how much slower, but I'd venture to say 25-30%. In other words it took 25-30% longer to fire off x number of images with the 100-300 lens than with the 12-50. Has anyone else noticed this? Is this behavior normal? I'm leaving on a long vacation trip in two weeks, and the Panny 100-300 works fine otherwise. I'm a bit worried that there's something wrong with it though, but I need it for my trip. Thanks!