I totally agree that we can't really judge sharpness critically from these shots (or the ones I posted last week) since they were not taken in a controlled way using a tripod. In fact I am amazed they are as sharp as they are, since they were shot handheld in a very strong, gusty wind of a moving, distant subject. I very much doubt, under such conditions, that any camera could have produced anything sharper. Wish I had had a tripod at the time. The other lesson this has taught me is that shooting a moving train at such speeds, which I am accustomed to being able to do between 1/250 and 1/500, requires faster shutter speeds if I want them to be sharp at 100% purely because 100% represents a much 'closer look' than I am used to and fractional motion blur is going to be evident. The trouble is, so is lack of depth of field on the scene and noise! So the juggling of shutter speed (to stop the train), aperture (for DoF) and ISO (for low noise) is a tough call here, even in good light. It always was challenging, but getting critically good results on a 40MP camera is even tougher than I had expected. I was used to it being an issue on 6x7, but the grain hid a multitude of sins...
As for AF, the only such lens I have is the 55mm f2.8. On that lens, it's fast! All my other lenses are manual focus 6x7 lenses. The focus points I can't tell you about right now since I use the centre point only and recompose. With this sort of subject, there is no problem with this technique since they are a long way from the sensor. I can't consult the manual to tell you either since I only have it in Japanese! However, I will have a fiddle about some time soon and let you know.