Managed to get out for about 20 minutes to play with the D750 on the beach with some seagulls. I've posted them here in full res because I haven't done much to try improve them, I'm simply posting them as is and I thought I'd give people a chance to check them out. I know the photos aren't spectacular so I haven't posted them for improvements, it was a quick session just to play with the AF. Most were shot at F2.8 to try make any focus issues more obvious but I had some issues with over exposure so I dropped it to F4. I used highlight weighted focus due to the varying conditions (into the sun, away from the sun etc) and I wanted to try keep the photos from being over exposed where possible. Post processing is my default import settings into lightroom (a little clarify and vibrance and adobe standard profile) but nothing else has been done to them. They have been sharpened for screen on export using the default lightroom sharpening.
I tried to take photos in a variety of conditions to test the AF, into the sun, busy backgrounds. Unfortunately the seagulls were lazy ass bastards who wouldn't move if ISIS were coming. If I walked towards them, they would walk away. This resulted in me having to take a run at them and then try swing the camera up before they could settle but being lazy ass seagulls, they settled faster than a biggest loser contestant in a mcdonalds. Quite a few of the shots didn't give much time for shots, but surprisingly almost no shots were missed. I reckon about 5 out of 100 and almost all of those were once i threw the camera up and tried to swing without having the sensor on the bird at very close range so its more likely my four swing duck technique than anything else. The only really sad thing was seeing seagulls with fishing line attached to their feet knowing the amount of discomfort they are probably in and very little way to remove it.
Overall, although its not the best test, I'm blown away by the AF.
If you want the full res copies, you can find them here: