And they won't either, but Apple hasn't denied it either, if you read all they have said is this hasn't resulted in any 'breach', not that they didn't have a hole they have now patched. Of course it wasn't breached, people got in using passwords, they didn't hack their way in without passwords.
And another point, to all those people on here that were telling me these photos were not stolen from the iCloud, well it certainly reads to me as though Apple has confirmed they WERE.
We wanted to provide an update to our investigation into the theft of photos of certain celebrities. When we learned of the theft, we were outraged and immediately mobilized Apple's engineers to discover the source. Our customers' privacy and security are of utmost importance to us. After more than 40 hours of investigation, we have discovered that certain celebrity accounts were compromised by a very targeted attack on user names, passwords and security questions, a practice that has become all too common on the Internet. None of the cases we have investigated has resulted from any breach in any of Apple's systems including iCloud(R) or Find my iPhone. We are continuing to work with law enforcement to help identify the criminals involved.
So in one cleverly worded paragraph, they state no 'breach', but confirm celebrity accounts were accessed and photos stolen.
As I have already stated this IS Apple's fault due to their systems not being setup to lock your account after multiple incorrect password guesses.