Heck, even a Pentax can take a bad picture (of a Cannon, go figure!)
I'm not sure the point of this post, but it's obvious you were actually not "inprest" [sic] with the skills of the photographer. But you're trying to make it a "Canon" bashing thread, which is stupid. I got great shots with Pentax, and when I switched to the "other" brand (other white meat?), I still get great shots.
If someone can't get great shots with the EOS-1Ds MKIII, then they're just a horrible photographer (there is someone on the Canon forum - POTN, who fits this category, unfortunately) If you can get good shots with your K10D (or K20D/*ist DS), then you're a good photographer. Case closed...
Now here is a better Cannon shot -