From Comcast in San Francisco, I'm seeing that CloudFlare is the slowest of Google Public DNS, OpenDNS, Level 3, and Comcast's resolver.
Definitely not what I was expecting...
CloudFlare:
$ ping -c 240 -i 0.25 1.1.1.1
...
--- 1.1.1.1 ping statistics ---
240 packets transmitted, 240 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 16.271/17.286/25.105/1.236 ms
Google Public DNS: $ ping -c 240 -i 0.25 8.8.8.8
...
--- 8.8.8.8 ping statistics ---
240 packets transmitted, 240 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 5.092/10.083/35.949/2.426 ms
OpenDNS: $ ping -c 240 -i 0.25 208.67.222.222
...
--- 208.67.222.222 ping statistics ---
240 packets transmitted, 240 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 8.596/9.847/25.898/1.788 ms
Level 3: $ ping -c 240 -i 0.25 4.2.2.2
...
--- 4.2.2.2 ping statistics ---
240 packets transmitted, 240 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 8.479/9.563/18.971/1.336 ms
Comcast's Resolver: $ ping -c 240 -i 0.25 75.75.75.75
...
--- 75.75.75.75 ping statistics ---
240 packets transmitted, 240 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 8.410/9.717/19.428/1.487 ms
It even looks like OpenDNS and Level 3 are better than Google Public DNS in terms of latency. replies(1):