I think a lot of people would have no problem predicting this pattern without looking at any Facebook data. Likewise, the participants and their more observant

I think a lot of people would have no problem predicting this pattern without looking at any Facebook data. Likewise, the participants and their more observant friends surely know that a relationship is likely to happen well before it becomes official. Relationships mostly follow the same course. I guess it's mildly interesting to actually see it in a more concrete form.