For the static targets I was shooting today, the AF system is both quick and accurate. I am using relatively old glass, no AFS or VR zooms, and had no troubles.
I normally use the center focus point, but made it a point to use many of the sensors on the edges to check for any problems. Everything worked like it was supposed to. I printed a couple of 8X10's of my daughter, and the focus was spot on. That 1:1 image viewed on screen were very good as well.
I know that people are concerned that the focus points are bunched together in the center of the frame, but it really is not as bad as expected. Then again, coming from an F-100 with only 5 sensors, I may just be used to a more compact array.
I will be shooting a cross country race this weekend, which should give the AF-C a workout. I should also see if the FPS is as high as advertised when these high-school runners go flying past me. I'll add more info then.