Great idea...i'll do that. I'm surprised you use single point. I just moved from pentax and used a tracking setting and seamed to work really good. I heard the Nikon D750 was worlds better.
With BIF ( and any other shot of wildlife/human for that matter) getting the eyes in focus and sharp is the most critical in my opinion.
I can get all the feather detail and all the beautiful motion of the bird in perfect focus, but if the eyes are out of focus, the whole shot is ruined.
Tracking with single point gives me the best results.
2nd bold letter response.
Yes ,so far it is the best focus locking, tracking camera I have ever used. As a matter of fact, I also use a D7100 (which BTW is a great DX camera) but it won't come close to the D750 when it comes to spot on focusing most of the time.