I was kind of one of those people who thought JKR would continue to be a little secretive, even after Deathly Hallows. I don't know why--maybe out of habit, or desire to have us fill in the gaps ourselves, or just whatever. Boy was I wrong!
Here's yet another snippet from her, this one clearing up some of the plot ambiguities in DH (such as Neville pulling the sword out of the hat, and that whole Elder Wand business). After years of veiled hints and winks, this new Jo is going to take some getting used to.