I happen to see this in Flickr and I'm a little puzzled by the defocused area.
If you follow these steps, you will see what I'm referring to:
- Click on the image
- click on EXPAND icon on top right hand corner
- hover over the expanded image and click on it to expand to its max
Now, examine the defocused areas. You will see the messy bokeh, dots and untidy pixels.
The image seems to be uploaded at a pretty large size. Resolution of the focused elephant looked great. It's bright sunshine so the issue with the defocused area is certainly not noise.
Something is weird with this sensor. I'm not sold.