The way I read the article is that these collisions are happening all the time but our current detectors are not powerful enough to pick up the impact of gravity waves on pulsars etc. The article is then suggesting that in ten years time the detectors will be sensitive enough. Again a rash statement but this interpretation shifts the focus from the actual events occurring* to the way we detect the events once they occur.
*I think the argument is that as the universe is so big, all possible events are happening all the time if we just know how and where to look.