I just tried it on a couple of RAW images that Tim posted on another thread.
The one thing I did notice, right off the bat, is the amount of smearing in the ISO3200 images that could not be brought back using Unsharp Mask or Nik Sharpener. I've noticed the smearing in virtually all the 7D High ISO images posted. I'm not sure it is smearing or just not very sharp at the pixel level. I've noticed this in most 7D images posted. Some I've even commented whether the image was OOF.
The 7D does seem to have a very fine/even noise characteristic which cleans up very well. It's the lack of detail which is my concern. ISO1600 is very good, imo.
I'm starting to think that there is some NR being applied to the high ISO RAW images.