My comment was a follow up to the "5d2 has noises issues too" thread.
I think you misunderstood the point of my post. I never said the 7D was on par with the 5DII in noise across the board, I simply said that it had the same functional issues
as the 7D (and, for that matter, probably all current Canon DSLR's). That issue being the +1/3 EV ISO settings are digitally pulled, and look a lot
worse than the +1EV and -1/3EV ISO settings. Michael7 seems to think the 7D is a truly horrid and unworthy camera, and I was trying to demonstrate that its not "horrid" but simply on par (functionally) with the rest of Canon's current gear, that the 5D II isn't a magic bullet that will bring true low-ISO bliss to his work...but that it will be, like the 7D vs. 50D, marginally better.
According to both DxO and DPReview's noise charts, the difference in ISO100 noise is indeed marginal. I think the DPReview charts show that the 5D II has a standard deviation of luminosity for ISO100 noise at about 1-1.2, while the DPReview charts show that the 7D has a standard deviation of luminosity for ISO100 noise at about 1.9. Thats on a scale of 0-20. Yes, the 5DII is better, but its not an ungodly difference of "miles", as I think someone put it. Now, talk about high ISO performance, and there is no question the 5DII outperforms the 7D by a healthy margin. But the discussion here was about ISO 100, not ISO 3200.
All that aside, I'm sorry that @freidmud purchased a camera he does not like, and cannot return. I don't think anyone anticipated that outcome when they recommended the camera. I hope you find a way to get your money back, and I hope you find a camera you do like. Given your need (you mentioned you photograph action sports or something like that), I don't know that there are a lot of options. The 7D was designed for that kind of work, and while it is not the king of the crop when it comes to AF, I think the only other options are the 1D IV, the 1D X, or jumping ship to Nikon (which seems to have pretty great AF in much more of their lower model DSLR's than Canon does, as well as excellent glass.)