Wow, a new thread.
I'm loving the pinpoint AF of my new 5D MkIII. I thought I'd miss the sensor-crop of my 7D, but the AF of the 5D3 is so much more accurate that my keepers are two or three times higher. I had a dozen shots to chose from of the fellow below, all of which were tack-sharp:
Bark, bark, bark, bark, bark, bark...
, on Flickr