Quick hack to test download times, see http://blog.stackoverflow.com/2011/05/the-speed-of-light-sucks/

program.cs

using System;
using System.Diagnostics;
using System.Net;

namespace ConsoleApplication1 {
    internal class Program {
        private const int COUNT = 20;

        private static void Main() {
            var urls = new[] {
                "http://sstatic.net/js/full.js",
                "http://sstatic.stackexchange.netdna-cdn.com/js/full.js",
                "http://d1d5ue6vu5b30i.cloudfront.net/js/full.js",
                "http://wac.43df.edgecastcdn.net/8043DF/sstatic/js/full.js"
            };

            foreach (var url in urls) {
                MeasureUrl(url);
            }
            Console.ReadLine();
        }

        private static void MeasureUrl(string url) {
            var client = new WebClient();
            var sw = Stopwatch.StartNew();
            for (var i = 0; i < COUNT; ++i) {
                client.DownloadData(url);
            }
            sw.Stop();
            Console.WriteLine("URL {0} took {1} ms", url, (sw.ElapsedMilliseconds/COUNT));
        }
    }
}