I just ran some tests for faster action (not motor sports, or any kind of sport really, but bear with me for a moment). First, we went to my daughters pony show. All week she was at Pony/Horse camp, and then they have a little demonstration at the end of the week. This is, of course, not at all sports, but they are trotting around a ring, and I am much, much closer than at typical sports. I got a rough estimate of >90% keepers. More specifically, I only had one missed shot due to AF. I would say the AF is as fast as my 5D + 70-210 USM, easily. The problem with the m43 cameras now is not AF speed but contrast detect AF. What do I mean by that? With CAF, you usually have to decide -- do you want 1) a center point focus point (so, focus and then recompose) or do you want 2) to use grid focusing. The problem with the former (center focus) is keeping up with the action. The problem with the latter is, if there is something MORE contrasty than the subject, the camera is equally likely to lock on to that instead of my subject. So, many more blown shots. When I tried soccer with my EP1 o the end of a telephoto, I ended up with so many in focus backgrounds, and out of focus kids. THE EP3 EXCELS HERE with it's capacitive touch screen. Through my daughters riding, my left hand held most of the camera, and operated the zoom, my right hand cradled the camera and fired off pictures via my thumb. I could compose however I wanted, then touch the screen for the shot. If I wanted my daughter to the left, looking right, I'd wait for the shot, touch the screen, and blam. Perfect focus on her face, OOF background, composed the way I wanted it. The samples below use the EP3 + 14-150 and ISO1600 (I wanted the highest possible shutter speed to take shutter speed out of the equation). Subject is off center. No focus and recompose needed. No fiddling with setting the focus point. I only had to worry about the right focal length, then tap her face. I don't know about anyone else's experience, but this shot was certainly not possible with my EP1. It would have focused on the background. Subject is off center, and focus point (on the EP1) is too big. The focus point on the EP3 is configurable down to a 14X magnification box. And it's really easy to set. Now, I ran another, less successful tests when I got home. I brought a dying cicada to our chickens. Chickens love big bugs, and they'll chase each other to kingdom come to get them from each other. So, I was very close to the chickens, and they were moving both switfly AND erratically. My other problem was the day was overcast, and they were hanging around under the bushes, so there's just not enough light for a telephoto at 5.6, ISO around 800. So, no real keepers, but just look at the pictures for a moment. Look at the plane of focus. The camera actually focused RIGHT WHERE It should have, but the shutter speeds were just too low. Clearly the shutter speed is too low, but I tapped the black chicken on the right, and look at the grass. The camera focused in the right place, but the shutter speed was too low for these guys chasing each other (shutter speed was 1/50 at 800 ISO. FL=90mm, or a 180mm FOV) This chicken had the cicada (you can kind of see it in her beak) and was running right by me. The shutter speed was at 1/100 second, and I just tapped on her was she was on the right side of the frame. There was no time to set focus points. These guys were darting all about. NO WAY I got this with an EP1. Off center subject, and an all black chick (no contrast, so the camera would have gone for center point grass). This chicken is trotting towards me. Again, I just tapped on her head near the top of the frame. The shutter speed was a better 1/250, but you can also see it missed the exposure a bit. If I had this in RAW, I probably could have saved it, but jpgs only for now (until the RAW converters are updated) I am very, very excited about the possibilities with the EP3. My only criticism is that the camera is not setting exposure with the touch point, so you have to manage exposure independently. This is a bad thing. I Oly would add AE to the touch point, I can't think of ANY camera I'd rather have that costs <$2,000 for action (so, I'm leaving out here the Canon 1 series, which I rather think is the top action shooter, but costs >$3,000).