The red shirt thing was discussed with Harry well in advance of any commitments. I would say that, as of right now, the twins will likely red shirt. That's fine with me if they get 5 yrs of education for their efforts. Hello, masters degrees!
Katherine, the 5' 11 wing, will almost certainly red shirt. However, Caroline (5' 10) is a rare triple threat PG and Harry already knows that he will have a difficult time convincing himself to red shirt her.
We'll see what happens. I'm ambivalent and fatalistic concerning the topic, as are the girls. Que sera sera.
The 2013 recruiting class has the possibility of being really, really good. If the coaches get the players they're shooting for, the more likely it will be that both twins red shirt next year, in my opinion.