The more I use Face Detect and Eye Detect AF, the more I agree with Viggo (and many others) who have seen that during Face Detect, the critical focus is still on the eye. I am seeing the same thing.
And djack41, the difference I am seeing, is the second box (one for the face, one for the eye). Where the box is drawn and its relative size to the subject is the only difference I am seeing in my results.