The birds look blurred to me, too.
That's exactly the effect you see if there's an object really close to the end of the lens, like grass in front of the lens. It causes an image of that object to appear in all of the bokeh in the background.
For example, in this photo of mine, my release cable inadvertently crossed in front of my lens, you can see a perfect image of it in every point of bokeh.
You might also see this effect by using a crappy UV filter on your lens. It definitely would not be the camera's fault.
Astute observation. Thanks for posting, and it makes sense -- like using a cardboard cutout over the lens to create custom shaped bokeh, only accidentally with grass, branches, release cables or other things in the extreme foreground.
I've been saving up for a 70D, so reports of issues and flaws are on my radar (like when MichaelTheMaven? had a row of dead pixels on his 70D sensor). In my other "shooting" hobby, it's generally good practice to wait until a new model has been out a year or more to establish a reputation for reliability or to reveal any issues inherent to the new design. Since the 70D uses brand new sensor tech, it kinda falls into that category for me (although, I don't think I'll be able to wait a year
Anyway, it's nice to know this "issue" is likely not a camera issue.