I've just found this page in Hungarian. (There's brief explanations in English on the 7D forum pages at DPReview - look for "Thorough comparison of sensor generations".)

APS-c Sensor comparison in Hungarian

The same test image has been shot under a wide variety of conditions and with a range of Canon (from my old 10D to the latest 7D) & Nikon (D100, D200 & D300) APS-c bodies. The full image is available, as are small images for each combination of body and parameter for 4 different parts of the test image.

I notice that they seem to get rather larger differences between jpeg and raw images than I do where I own the same cameras, 10D & 30D. I don't know Hungarian so I've no idea whether the final images have been sharpened.