The 7D is my first DSLR - my last SLR was a Nikkormat FT. Prior to picking up the 7D, I hadn't used an SLR in about 15 years. Last declaration: I'm a software engineer and general technology lover.
All I can say is that I think the 7D is bad to the ass. From a technical standpoint it's a brilliant piece of work. Everytime I pick it up I'm learning both photography and the technology, so that's a huge plus to me. I love the technical details.
That said, it took me about a week before I started getting consistently reasonable shots with the camera, without the green box. I've played with all of the AF modes and haven't once thought that the camera was responsible for any problems I've had. I know where the weak link in the photographic chain is on this fence...
I read the other thread where the camera body was being blamed, and all I can say is that I don't have enough experience to know when to blame the camera (yet), so far I've found that yes, the 7D is a piece of work and if you don't set it up right, the guy next to you with a cardboard camera will be showing you up.
7D = winner in my book 