Wow, it is amazing how statements can be taken the wrong way and twisted up. I was there yesterday and heard Matt talk about the timing of upcoming updates. He didn't make it sound ominous at all.
Matt said that the panda updates are now on a more regular schedule, perhaps monthly, as we are used to them. The penguin updates are not on a normal schedule so to speak, so when they do hit we will know it. I do not recall him implying that new updates being ominous, he just did not say it that way.
This was NOT a warning at all, just a statement on the timing of updates. It was more like, "panda updates are tweaks" and penguin updates are ...updates.