My DNS was 89% faster than Ultra DNS and was actually the fastest. I am using Level 3’s DNS servers (4.2.2.2/4.2.2.3), which have always been the fastest for me.
Tested with Namebench and it actually said my present configuration is best, only have to add one tertiairy DNS server. I could consider because my present primairy DNS is 7% better as the others,