That's not what the theory says, though the article is admittedly misleading on this point. What it means is that the observable horizon, from a given point, expanded to this size in a fraction of a second; space became "transparent," and this transparency is what "traveled". No matter, energy, or information actually traveled faster than light, according to the model.
An analogous situation - take a flashlight beam and wave it across the sky - you've made a beam "travel" from one star to another in a few seconds, but nothing actually travels from one star to the other in that time, even though, eventually, the beam reaches both stars simultaneously. (i.e. relativity still holds)