Property paradox

gistfile1.cs

    public class PropertyWrapper : IFixture
    {
        class TestClass
        {
            public string TestProperty { get; set; }
        }

        public void Execute(Runner my)
        {
            var prop = typeof(TestClass).GetProperty("TestProperty");
            var obj = new TestClass();

            my.Execute("raw", () =>
            {
                obj.TestProperty = "asd";
            });

            var stdDel = (Action<TestClass, string>)Delegate.CreateDelegate(typeof(Action<TestClass, string>), prop.GetSetMethod());
            my.Execute("stddel", () =>
            {
                stdDel(obj, "asd");
            });
        }
    }

gistfile2.txt

PropertyWrapper
raw       : 00:00:00.0003588
stddel    : 00:00:00.0002367