This is an "all beagles are dogs but not all dogs are beagles" situation. If their 24 class is VJ, then their 24 class was all there.
I'm never been and I'm not still overly optimistic but this doesn't mean anything. When Matrim winks or Zionn says next, we can take it to the bank. But when someone is this vague, it's speculation.
Either Flagg verbaled to Duke prior to or during the visit, or he didn't. We've seen nothing indicating that he has committed to Duke. This is just "I'm feeling good about things." Super, enjoy that feeling.