i'm quite interested about the AF system problem vs d700. first time i'm hearing it - do most of u feel the same way?
Limitations avail in every body. Understand what it cannot achieve and use that to your benefit.
It won't benefit you if you choose to gripe over it 'just not being fast or accurate' enough. Maybe a shooting style change, or understanding the limitations of what it cannot do will help you use it better in ways it can help you.
So far have been playing with one, yes, it definitely CANNOT compare with a D4, but on it's own in it's D600 class, it's very sufficient in what it's set out to do. No point harping on it's limitations. Work around it. If you can't, then it's not for you.