Yes, it is good news. Sort of. So many months after the release date, I would like to see Canon stop asking what people think is wrong and just admit there is a serious problem, they are working on it and then announce a fix. The specifics they are asking for are irrelevant and a little insulting. (Lenses, etc sure didn't matter on my camera's problem.) Gathering this data is a lot of work on our part. And it's already documented on several forums in detail. Why can't they take a couple hours and read for themselves? My low light AF was broken. Period. Just like many others have described. I don't care if they just say they found a QA problem, a bunch of drunken assembly workers or a batch bad of components. Just explain the problem (or not), fix the problem and let's move on. Anything else sounds like stonewalling while they take in profit. You really can't tell me that they are that clueless about every aspect of this camera before and after it was RTM'd in early 2012.
The camera I had showed defective low light AF. It was unmistakable. Thank goodness I returned it in time and received another one in exchange that so far seems to be good and a compliment to the Canon line. The fact that the low light AF works so well in this 2nd camera is a testament to the fact that the first one I had was faulty. I'm sorry about anyone who is dealing with the AF problem I had with my 1st camera on their camera that can't be exchanged!
Thanks again for everyone's comments, support and honest feedback about their camera.