Canon 70-200 IS II up to par?

[CaPpedDoG]

Hi, I recently upgraded from a D7K to a 5D3. I purchased a 70-200 IS II with it too. I'm very happy with them both! However, a friend of mine is telling me that my shots aren't looking up to par. He is saying the lens should look better. Here are a few quick shots. You should be able to view the original file size (5760x3840) I think it looks nice and sharp. Does it look up to par?

1/160, f5.6, ISO 400, 140mm
271A0184_zps4621f8c1.jpg Photo by donkbet45 | Photobucket (http://s1114.photobucket.com/user/donkbet45/media/271A0184_zps4621f8c1.jpg.html?sort=3&o=4)

1/160, f4.5, ISO 100, 200mm
BSP_0224_zps366e02ef.jpg Photo by donkbet45 | Photobucket (http://s1114.photobucket.com/user/donkbet45/media/BSP_0224_zps366e02ef.jpg.html?sort=3&o=3)

1/2000, f6.3, ISO 400, 200mm
BSP_0224_zps366e02ef.jpg Photo by donkbet45 | Photobucket (http://s1114.photobucket.com/user/donkbet45/media/BSP_0224_zps366e02ef.jpg.html?sort=3&o=2)

1/400, f2.8, ISO 100, 200mm
BSP_0368_zps3895c5cd.jpg Photo by donkbet45 | Photobucket (http://s1114.photobucket.com/user/donkbet45/media/BSP_0368_zps3895c5cd.jpg.html?sort=3&o=1)

1/400, f2.8, ISO 100, 200mm
BSP_0368_zps3895c5cd.jpg Photo by donkbet45 | Photobucket (http://s1114.photobucket.com/user/donkbet45/media/BSP_0368_zps3895c5cd.jpg.html?sort=3&o=0)

Thanks in advance :)

[Realist]

Looks perfectly sharp to me. I don't think there's any problems with that.

[Iguanasan]

I only had to look at the first one. If you are not satisfied with the detail on that cute little birdie then you can give away all your camera gear to me and I'll put it to use ;)