I disagree with everyone who's pining away for a "true 5." With the offensive style Duke played last year and will presumably play again this year, a low post "banger" will only hinder the offense, unless he's also an athlete who can run with the break. Look at Phoenix, the offense Duke's is supposedly modeled after: they had no "true" center and had the best or second best record in the NBA and were very exciting to watch. Then they imported Shaq, ostensibly to help them get further along in the playoffs, and they became an average team, because the big guy couldn't keep up. Seriously, does anybody really think Duke's offense won't score enough points this year?
Now, I will grant that Duke needs someone who can guard the other team's center. Obviously that wore down Singler last year and another player or players who could share that load would help the team. But I'm not sure Zoubek's feet are quick enough to do that effectively, so I'm not sure he'll ever be that guy. And I'm not sure Lance will ever be strong enough to guard the biggest players. And freshmen tend to have a long learning curve on defense at Duke. Still, I think we have to hope that Plumlee or OC are able to take some of that load and/or that Thomas got stronger or Zoubek got quicker.
Sorry, I'm meandering a little. I guess my point is that it doesn't matter if Plumlee is a "finesse" player on offense. If he (or any other big man on the roster) can bring it on D then the team will be fine.