The label on the PlaylistDetailViewController is not updating per the instructions in this video.

class PlaylistMasterViewController: UIViewController {
....
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "showPlaylistDetail" {
            let playlistDetailController  = segue.destinationViewController as PlaylistDetailViewController
            playlistDetailController.segueLabelText = "Testing 1 2 3!"
        }
    }
}

class PlaylistDetailViewController: UIViewController {
....
    var segueLabelText: String = "Testing..."
    override func viewDidLoad() {
        super.viewDidLoad()
        buttonPressLabel.text = segueLabelText
    }
}