I've downloaded and took a look at it. A couple things jump out at me dealing with the noise seen at 100%. First is the exposure compensation is -2/3 and it's under-exposed, so that's going enhance the noise (not in a good way). So that kind of explains to me why we are seeing as much as we are at 800ISO.
Second thing would be the focus point, which is at a tree limb, a good 2 or 3 feet in front of the bird. Actually it might not matter at all because it's shot at F/16. However, you are using the 60D which is APS-C, and diffraction begins, with a 18mpx sensor at F/8.1. Keep in mind f/8.1 is where diffraction starts, and if it's noticeable or not depends on how far away you are viewing the picture at 100%.
DPP and CS6 show this image as being underexposed quite a bit, and considering the noise and diffraction, it's going to be very hard to recover the details and colors. I'm not the best at post processing (TeamSpeed is really good), so I'll leave it to others to "recover" the image as best they can.
Lastly, I think this image would have been sharper at F/8 and with +1 exposure compensated. No diffraction, ISO 200, and still you've been able to bump up the shutter speed X2 or more. I would have loved to see a side by side of the two.
Hope that helps,