Okay, here are some of the results from yesterday.
First of all, here's an image (snow leopard) that I would consider to be in focus - it was also a technically challenging one for the camera, so I am glad it nailed it:
This one's marginal, but on balance I'll consider it a pass:
This one of the binturong is also a pass:
This one is front focused (camera AF was aimed in the middle of the sun bear):
This is is back focused (camera AF was on the middle goat, but it's the goat on the right that's in focus):
This is an example where the camera got it right:
I could post more, but I wanted to give a sense that the camera focus accuracy shifts from subject to subject, and seems to depend on the subject colour (which would point to the colorimetric sensor as the culprit).
I haven't provided any examples, but I've also noticed that in a batch of photos taken in continuous mode, the focus will shift from shot to shot even though neither the camera nor the subject is moving - hence the AF mechanism in not consistent.