Great find but a meteorite the size of a house smashing into earth would be a lot bigger news than a 5 sentence article. I think the aussies are exagerating just a bit. . .
It would be my guess that this particular witness was reporting the size of the fireball he saw, which doesn't necessarily correspond to the size of the meteor.
If it was close to him, and, as he reports, it exploded with a large flash on impact, the impression left would have been of something very large, even if in reality it wasn't.
What convinced me to post the story were the witnesses at the Sydney airpot tower that also saw it. No matter what the actual size, it's another confirmed hit.