You can read into comments several ways, I bet GoogleGuy (sorry I'm nostalgic so will refer to matt by this name!) is laughing at how much noise a few comments of his are making.
IMO, they are already hitting over optimised sites, have been for the past few years, seems to be happening more at the moment, wouldn't surprise me if this "team" that are actively working on this are going from industry to industry which is why he said next few months, then weeks - it will depend on when your industry appears on the list...
In my industry I'm already seeing overly optimised sites taking a knock - so just to re-iterate i think this is an active project that is already underway... i also think it's being done more manually at the moment, but will be used to tweak the algorithm as they go -
hey, it's all just about our opinions, these are just mine