Reading is an act of guessing. I guessed that if the moon had recently been impacted that hard we would be hearing about it from more than CNN, and likely would have known about it in advance. I don't feel as though I have been mislead.
Funnily enough I went to the article because I guessed that it would have literally formed overnight by some surface movement originating from within the moon not some external cause.
And I believe my guess is as good as yours except in hindsight of course.