Expected speed of File.Copy on a SD card

I need to copy a file on my SD card but I feel that the speed is rather slow. So what is the expected speed of copying a file onto the same SD card?
With my Kingston 2Gb SD card it takes 30 seconds to copy a 658Kb file, is this normal?
FEZ Panda on a tinkerer kit.
Here is my test program.

using System;
using System.Threading;
using System.IO;
using Microsoft.SPOT;
using Microsoft.SPOT.IO;
using GHIElectronics.NETMF.IO;
using Microsoft.SPOT.Hardware;

using GHIElectronics.NETMF.FEZ;

namespace File_Copy_test
    public class Program
        public static void Main()
            PersistentStorage sdPS = new PersistentStorage("SD");

            string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;
            string FileName = rootDirectory + @ "\Test.txt";
            string CopyName = rootDirectory + @ "\TestCopy.txt";

            DateTime StartT, StopT;


            Debug.Print("Copy start...");

            StartT = DateTime.Now;
            File.Copy(FileName, CopyName, true);
            StopT = DateTime.Now;

            TimeSpan Tid = StopT - StartT ;




There is some nice enhancement on file system speed added to firmware coming out in couple days. Give it another try when new firmware is out please

This is good news Gus. Looking forward to the new release.