Long story short... they excanged camera bodies with me. So I am sitting here typing with a new(used) 7D body that seems to be functioning much better than the original.
Glad that you are happy now that you've got your camera swapped. It would be interesting though to see you take some more of the same pictures tonight and to see the results. My guess is that they will be pretty much the same.
As lots of people have said, there were issues in the first batch of pictures, (like WB settings, focus, shutter speed etc) and unless you change your settings, you will invariably end up with the same. However, this is where the step up in camera kicks in ... you have to learn/know how to get the results that you're looking for, by adjusting the controls to suit a particular situation. I recently stepped up from a 550d/T2i to a 7d myself and am still not in control of the 7d. However, the fact that I had learned all the controls on the 550d and experimented with different situations helped me a lot and put me in a good position to make the step to "the next level". I have a friend that had the 600d for a year and just bought a 7d because he "liked the feel of mine"! He is struggling with it and is complaining to me that he wasted his money! When in fact, if he had taken the time to learn his way around around his 600d instead of using the auto/assisted modes all the time, he'd be happier now.
Anyhow, enough of my rambling. Get out there and practice, practice and then practice some more.... but most importantly, enjoy yourself!