Interestingly OpenDNS is still slower from my location than Norton DNS(testing with Steve Gibson's DNS Benchmark software) with Google Public DNS still the fastest for me. TBH all 3 are very very close in speed for me. With my internet connection being quite decent, speed alone is not the main determining factor for me choosing Norton DNS over others. I am more interested in malware and phishing site blocking, that is why i use what i use. ClearCloud(unfortunately this one is being discontinued) and Norton DNS are the best at this imho.