Once you're at the exchange point, it doesn't really matter which provider you choose. My point is, low latencies to datacenter-located resolver clients is great but the advantage is reduced when consumer internet users have to go across their ISP's long private fiber hauls to get to a POP. I suspect that Cloudflare and Google DNS both have POPs in Dallas, which accounts for the similar numbers to my private resolver.
I'm getting ~26ms to 1.1.1.1 and ~19ms to my private DNS resolver that I host in a datacenter in Dallas. I'm in a small town in Kansas, connected by 1 Gbit ATT fiber. Residential customers won't see anything this fast. Where are you testing from? I'm going to guess: a datacenter.
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