I used to use google DNS and OpenDNS long time ago, didn't notice any improvements. I recently heard a security expert saying that OpenDNS is the best way for malware protection. But found out that this feature isn't free.
I saw a gamer saying that google DNS is faster for regular users and OpenDNS is better for gamers because of lower ping, and all of the bloggers recommend using a DNS service.
My brother noticed that both providers had higher ping on steam than our default DNS provider and he read that DNS won't affect Dota 2 on steam in anyway.
I did my tests, in incognito and flushed DNS after each test, I let speedtest pick the closest DNS. My results are:
All results are similar if not worse than the default DNS, if anything OpenDNS has the lowest ping but by a small margin, if I were to repeat tests that gap would go away.
Does DNS providers really affect speed or security or gaming? Gaming nowadays is mostly on steam, so does it affect steam?