Yeah, that's a problem (the not opening CR2s). In the comparometer tool, we're comparing in camera NR from 7D vs. in camera NR from 7D2. The "7D Lab samples" link under the "difference" link above, (or just click here), shows in camera NR set to 0 and set to 2. The 0 set might be the best indicator we have of actual sensor noise levels.