There are many DNS servers that are available free for you to use but you need a way to choose. Enter namebench!
namebench is a free utility that will test your current DNS server and many others to find you the fastest one. It's available at http://code.google.com/p/namebench/ and runs on Mac OS X and Windows. Choose the appropriate download for your operating system and in just a few seconds (it's tiny) you'll have a copy. When you run it, it will extract and open its interface.
If the interface looks confusing don't be worried. The defaults will be fine. Just click on "Start Benchmark" at the bottom right.
After a few minutes of testing the results will appear in your web browser.
The top part is what you're really interested in because it tells you how much you can speed things up and which DNS servers to try.
The graphs below can give you some idea of how many milliseconds improvement you can expect. Yes, I did say MILLISECONDS.
For more assistance contact Technical Support here.