Yea, but it was the first time in ... years. And remember in the old days, sometimes they'd announce it and for one reason or another it wouldn't happen. So we don't know if it did.
I can't even tell from their messages if the system will be down while they're working on it. Even if they don't tell us, they usually tell the AdWords advertisers if they won't have access to their accounts, and I haven't seen that yet.