Is there a more efficient way of getting facebook albums with their cover photo by using C#, Facebook .NET SDK and fql?

Question

I want all albums from facebook and get the src property of the cover photo. This is where it became tricky. I wrote the following code to do this, but i'm wondering if this can't be done in a more efficient way?

var facebookClient = new FacebookClient(accessToken);

        var sw = Stopwatch.StartNew();
        dynamic facebookAlbums = facebookClient.Get("/fql",
            new
            {
                q = new
                {
                    coverPids = "select name, link,aid, cover_pid from album where owner = 56615007038 AND photo_count > 0 ORDER BY created desc",
                    coverSrcs = "select src, src_big,aid from photo where pid in (select cover_pid from #coverPids)"
                }
            });
        sw.Stop();
        Console.WriteLine("fql query took: " + sw.ElapsedMilliseconds);
        sw.Restart();
        var coverPids = ((Facebook.JsonArray)facebookAlbums.data).Cast<dynamic>().FirstOrDefault(i => i.name == "coverPids");
        var coverSrcs = ((Facebook.JsonArray)facebookAlbums.data).Cast<dynamic>().FirstOrDefault(i => i.name == "coverSrcs");

        if (coverPids != null && coverSrcs != null && coverPids.fql_result_set != null && coverSrcs.fql_result_set != null)
        {
            var coverSrcsFqlResultSet = coverSrcs.fql_result_set as IEnumerable<dynamic>;
            var coverPidsFqlResultSet = coverPids.fql_result_set as IEnumerable<dynamic>;
            var test = coverPidsFqlResultSet.Join(coverSrcsFqlResultSet, album => album.aid, photo => photo.aid, (album, photo) => new
            {
                name = album.name,
                link = album.link,
                aid = album.aid,
                cover_pid = album.cover_pid,
                src = photo.src,
                src_big = photo.src_big
            });
        }
        sw.Stop();
        Console.WriteLine("processing took: " + sw.ElapsedMilliseconds);
        Console.ReadLine();

The times are now as follows when performing this 10 times in a loop:

• fql query took: 717
• processing took: 204
• fql query took: 304
• processing took: 0
• fql query took: 265
• processing took: 0
• fql query took: 251
• processing took: 0
• fql query took: 220
• processing took: 0
• fql query took: 237
• processing took: 0
• fql query took: 225
• processing took: 0
• fql query took: 224
• processing took: 0
• fql query took: 225
• processing took: 0
• fql query took: 219
• processing took: 0