I like my 7D, and it is a way better camera than I am a photographer. Yes, it gets noisy by ISO 1600 and especially beyond that, but it is still an excellent camera.
I will get the 5D3 if it ever becomes available before I die. But that doesn't make the 7D a bad camera, especially given that it's 2.5 years old. In that context, it's excellent.
The 7D is not a bad camera. I don't like the nature of the images it takes.
My 40D was "ok" but first started a trend that carried into my 50D and then the 7D.
The main difference across these generations was more pixels, same space.
To me, pixel size impacts the quality of the image generated.