I could never figure out why a collision between massive bodies would cause a gravity wave blip. It seemed to me that two large bodies added together would cause the waves of one large body of twice the mass (rough calculus: two neutron stars should look like one black hole). This article implies that the waves are caused by the rapid oscillation of a gravity source, not the collision itself. And that when the massive bodies are about to collide they orbit each other with such an amazing high frequency (imagine neutron stars orbiting each other 1000 times per second!!!!!) that it creates these waves.

If the popular science (lower case intended) articles would stop saying "...gravity waves caused by the collision..." and started saying "...gravity waves created just before the collision of massive bodies...", then it would be a lot clearer. Likely the scientists never felt the distinction was important enough to make a big deal of. And likely the reporters didn't know.

Hats off to Space-dot-com for getting it right (for once).