MonoTouch DialogViewController issue not showing data immediately

PapersService.cs

using System;
using System.Collections.Generic;
using RestSharp;
using WhitePaperBibleCore.Models;

namespace WhitePaperBibleCore.Services
{
	public class PaperService
	{
		public PaperService()
        {
        }

        public void GetPapers(Action<List<PaperNode>> success, Action<string> failure)
        {
            var client = new RestClient(Constants.BASE_URI);
            var request = new RestRequest("papers.json?caller=wpb-iPhone", Method.GET) { RequestFormat = DataFormat.Json };

			client.ExecuteAsync(request, (response, async) =>
            {
                if (response.ResponseStatus == ResponseStatus.Error)
                {
                    failure(response.ErrorMessage);
                }
                else
                {
                    success( SimpleJson.SimpleJson.DeserializeObject<List<PaperNode>>(response.Content) );
                }
            });
        }

		public void GetPaperReferences(int paperId, Action<List<ReferenceNode>> success, Action<string> failure)
        {
            var client = new RestClient(Constants.BASE_URI);

            var request = new RestRequest("papers/" + paperId.ToString() + "/references.json?caller=wpb-iPhone", Method.GET) { RequestFormat = DataFormat.Json };

            client.ExecuteAsync(request, (response, async) =>
            {
                if (response.ResponseStatus == ResponseStatus.Error)
                {
                    failure(response.ErrorMessage);
                }
                else
                {
                    success( SimpleJson.SimpleJson.DeserializeObject<List<ReferenceNode>>(response.Content) );
                }
            });
        }
    }

	
}

PapersView.cs

using System;
using System.Collections.Generic;
using System.Linq;

using WhitePaperBibleCore.Models;
using WhitePaperBibleCore.Services;
using WhitePaperBible.iOS.TableSource;

using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MonoTouch.Dialog;

namespace WhitePaperBible.iOS
{
	public partial class PapersView : DialogViewController
	{
		public PapersView () : base (UITableViewStyle.Plain, null, true)
		{
			EnableSearch = true; 
			AutoHideSearch = true;
			SearchPlaceholder = @"Find Papers";
		}
		
		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			MonoTouch.UIKit.UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
			var svc = new PaperService ();
			svc.GetPapers (onPapersReceived, onErrorReceived);
		}
		
		private void onErrorReceived (string error)
		{
			MonoTouch.UIKit.UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
		}

		private void onPapersReceived (List<PaperNode> papers)
		{
			MonoTouch.UIKit.UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
			
			Root = new RootElement("Papers") {
					from node in papers
						group node by (node.paper.title [0].ToString ().ToUpper ()) into alpha
						orderby alpha.Key
					select new Section (alpha.Key){
						from eachNode in alpha
						select (Element)new WhitePaperBible.iOS.UI.CustomElements.PaperElement (eachNode)
			}};

			TableView.ScrollToRow (NSIndexPath.FromRowSection (0, 0), UITableViewScrollPosition.Top, false);
		}
	}
}