Looks like after Google released their public DNS lot of buzz is going around to solve issues with it when something doesnt get resolved. Though I did not find any major performance gain but may be because of cache but DNS Jumper might do the trick for you.
This application changes you DNS settings in few clicks which many users will find it difficult. Switch from Open DNS to any you wan and You will never know you did. And Yes you will need to have some admin privilege to run this application.
You can direct use few dns like Open, Google,Comodo, Ultra, Wsh and Open. Apart from this you can add 15 more which is configurable. Download DNS Jumper