So basically, it is the same sh**, different threat level rising.
My theory. It's Christmas, there is increased "chatter". Whenever they do this, it seems to result in an attack not happening. So, they keep with it.
Did you ever try to fix something that isn't working and you try some really obscure thing and it works. So, whenever said object breaks you just keep applying technique. That's what this reminds me of.
Good theory. Bob Windrem on MSNBC before the news conference said
...this much chatter at any other time of the year would not cause an orange alert...