Steve Balcombe
Forum Pro
Yes, but not because it's full frame. It's because it's a generation newer and has been given a high-end AF system. (And so it should at that price!)
5d3 has far better AF than 7D. In addition, I'd like to start getting big prints as well which is something I cannot do right now.
Full frame doesn't have inherently better AF - the 7D's is better than the 5D2's for example and they are near enough the same generation. It's true that the 5DIII has outstanding autofocus, but you also lose some of the benefit by switching from an f/2.8 lens to an f/4 lens.