Én azt tapasztaltam, hogy az OpenDNS majd minden esetben lassabb UPC hálózatból, mint a Google DNS! Nálam legalábbis kivétel nélkül lassabb...

root@INT-ROUTER:/tmp/home/root# ping 208.67.222.222
PING 208.67.222.222 (208.67.222.222): 56 data bytes
64 bytes from 208.67.222.222: seq=0 ttl=57 time=46.125 ms
64 bytes from 208.67.222.222: seq=1 ttl=57 time=43.174 ms
64 bytes from 208.67.222.222: seq=2 ttl=57 time=46.094 ms
64 bytes from 208.67.222.222: seq=3 ttl=57 time=43.769 ms
64 bytes from 208.67.222.222: seq=4 ttl=57 time=44.059 ms

--- 208.67.222.222 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 43.174/44.644/46.125 ms

root@INT-ROUTER:/tmp/home/root# ping 208.67.220.220
PING 208.67.220.220 (208.67.220.220): 56 data bytes
64 bytes from 208.67.220.220: seq=0 ttl=57 time=44.977 ms
64 bytes from 208.67.220.220: seq=1 ttl=57 time=44.811 ms
64 bytes from 208.67.220.220: seq=2 ttl=57 time=46.546 ms
64 bytes from 208.67.220.220: seq=3 ttl=57 time=44.636 ms
64 bytes from 208.67.220.220: seq=4 ttl=57 time=45.469 ms

--- 208.67.220.220 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 44.636/45.287/46.546 ms

root@INT-ROUTER:/tmp/home/root# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: seq=0 ttl=46 time=35.603 ms
64 bytes from 8.8.8.8: seq=1 ttl=46 time=40.015 ms
64 bytes from 8.8.8.8: seq=2 ttl=46 time=35.483 ms
64 bytes from 8.8.8.8: seq=3 ttl=46 time=36.034 ms
64 bytes from 8.8.8.8: seq=4 ttl=46 time=36.384 ms

--- 8.8.8.8 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 35.483/36.703/40.015 ms

root@INT-ROUTER:/tmp/home/root# ping 8.8.4.4
PING 8.8.4.4 (8.8.4.4): 56 data bytes
64 bytes from 8.8.4.4: seq=0 ttl=46 time=35.539 ms
64 bytes from 8.8.4.4: seq=1 ttl=46 time=33.635 ms
64 bytes from 8.8.4.4: seq=2 ttl=46 time=34.698 ms
64 bytes from 8.8.4.4: seq=3 ttl=46 time=36.029 ms
64 bytes from 8.8.4.4: seq=4 ttl=46 time=33.871 ms

--- 8.8.4.4 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 33.635/34.754/36.029 ms

Persze érthető módon még mindig a UPC saját szerverei a leggyorsabbak, csak hát azok megbízhatósága valóban hagy némi kívánnivalót maga után!

root@INT-ROUTER:/tmp/home/root# ping 213.46.246.53
PING 213.46.246.53 (213.46.246.53): 56 data bytes
64 bytes from 213.46.246.53: seq=0 ttl=60 time=8.278 ms
64 bytes from 213.46.246.53: seq=1 ttl=60 time=10.595 ms
64 bytes from 213.46.246.53: seq=2 ttl=60 time=10.948 ms
64 bytes from 213.46.246.53: seq=3 ttl=60 time=10.683 ms
64 bytes from 213.46.246.53: seq=4 ttl=60 time=9.239 ms

--- 213.46.246.53 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 8.278/9.948/10.948 ms

root@INT-ROUTER:/tmp/home/root# ping 213.46.246.54
PING 213.46.246.54 (213.46.246.54): 56 data bytes
64 bytes from 213.46.246.54: seq=0 ttl=61 time=10.517 ms
64 bytes from 213.46.246.54: seq=1 ttl=61 time=8.905 ms
64 bytes from 213.46.246.54: seq=2 ttl=61 time=9.450 ms
64 bytes from 213.46.246.54: seq=3 ttl=61 time=10.883 ms
64 bytes from 213.46.246.54: seq=4 ttl=61 time=9.317 ms

--- 213.46.246.54 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 8.905/9.814/10.883 ms

Aztán ezeken kívül van még egy halom szabadon használható publikus DNS szerver, szerintem még gyorsabb is akad köztük, de nekem hosszabb távon tesztelve a Google vált be leginkább!