As some of you know, I use a lot of cameras from different systems. Some of them come and go - I just like trying different stuff. At this point, I wouldn't say the autofocus is a weakness with very many cameras. There are exceptions like the EOS M which takes a long time to focus, but current NEX and Fuji cameras focus just fine. Same with DSLRs. None of those cameras really have an autofocus problem. Unless you compare them to current Micro 4/3 cameras that is. I'm not talking about AF tracking - DSLRs still have a strong lead there. I mainly take photos of people, and for people just living there life, nothing comes close to Micro 4/3s.* *I'm excluding the Nikon 1 System because while I know that is strong in AF, I have little experience with it or interest in it. It's probably the single most significant reason that I still use MFTs for the great majority of my photography. I can leave it on autofocus with automatic point selection and be very confident it is going to pick the right focus point. If there's are faces in the frame, the great majority of time it will focus on the nearest eye and even adjust the metering for proper exposure of those faces. Doesn't matter if they're in the middle of the frame or close to the edge. And it happens *fast*. It also happens in low light, especially with the latest Panasonic bodies. Lastly, for some scenarios, touch AF is a revelation, and the implementation of that on some of the latest MFTs bodies (I use an E-PM2). In the past several months, here are the cameras that have come through my hands (ownership, in some cases brief) that have been completely outclassed by my GX1, E-M5,and E-PM2 when it comes to autofocus performance for MY needs: Nikon D600, Canon 5D II, Fuji X-E1, Fuji X100S, Sony NEX-5N, Sigma DP2M. I've been wondering for a long time now how long it would take Fuji, Sony, et al, to catch up. Still wondering.