Edward, I'm not sure what your experience is with different cameras. The files from the Canon both required a little more work and seemed a little more fragile than the Sony files. The difference wasn't huge, and definitely not like the difference between DSLR and MFD, but it was there. The Sony files just have more meat to them. The Canon files weren't fragile in the same way that Nikon D2x files were, but more so than the Sony. Leica files are still another level better than the Sony.
All that said, I do not know the photographer who shot the files and whether he is any good or not. I can tell you that the compositions left a lot to be desired, he did some really stupid things with lighting, IMO the 24-70L lens he used should be sent back for calibration, and I'm being brought in to try to salvage the shoot. Still, to get the tonal range needed for the final image, I had to process the raws into a highlight, mid tone and shadow tiff in Capture One and blend the images in Photoshop. I am virtually certain that in the same conditions on the Sony I could have done everything in the raw processor. Most of their photographers shoot with either a 5DII or 1DsIII, so I will have some more experience with those files in the future.
The Canon does better with shadows than the Sony. Either the Sony holds highlights better, or just clips more naturally where the Canon tends to lose the reds first resulting in blotchy yellow skin that is virtually unfixable. If this makes any sense, processing the Canon files is more of a technical exercise where processing the Sony files is more of an artistic exercise. I suppose what that means is with the Sony files you have a lot more room for artistic decision in the raw processing stage where the Canon files feel almost like jpegs in that they are somewhat locked in. I may try to download DPP and see what that can do for the Canon files.
That said, I am still considering a switch back to Canon for reasons that have nothing at all to do with image quality.
And that pretty much sums up my concerns with Sony and committing to the platform. I can't tell you what the Canon 1DsV will look like, but I can be pretty certain that it will be a full frame 35 mm chip with a nice optical viewfinder, it will be a tank but can handle anything I can dish out. I know I've said this all before, but while the Sony A900 is a fantastic camera I hesitate to commit without knowing what the future holds. Swapping systems is just too expensive. I've minimized the damage in moving from Canon to Leica to Sony because the old Leica glass is relatively portable, but it is no longer meeting my needs.