Well...received my D4 on Thursday July 5th before I spent a week in Vancouver, BC, Canada for some training. Long story short, I took approximately 1500 images, mainly of the float planes landing and taking off from the float plane base in Coal Harbour and guess what, a lot if not all were soft. I thought this might have been due to looking at the images on my 15" Macbook pro. Got home and noticed the images weren't any better on my iMac. I decided to go out and do some wildlife shots with my 600mm and shot approximately 300 images. Not one of them was in focus. Called Nikon Canada this morning and they said to send it in for servicing. Send it in? I just bought the damn thing! Oh, they also suggested that I reset the settings... Mind you, I haven't had a chance to download the updated firmware so who knows, that might be the trick.
I am not happy with this at all; especially with the amount of $$$$ I've been dropping on Nikon gear.
I'd be curious to hear from others who have been experiencing focusing problems with their D4.