Found this post recently at http://www.webhostingtalk.com/showthread.php?t=1004995.
This report actually checked an average of all name servers on Pingdom for a month. The full posting said:
I have been really down on Dynect because of their sales approach and their in-the-face cocky attitude. My very few interactions with them have been to immediately put down companies and competitors with complete BS statements.
But I have seen many people say how great the performance is. So did a pingdom test for all of their servers (used Twitter) and I did a test for all of my name servers on DNS Made Easy.
These are averages for "ALL" name servers.
DNS Made Easy: Avg. Response Time 34 ms Slowest avg. response time 58 ms Fastest avg. response time 23 ms
Dynect: Avg. Response Time 37 ms Slowest avg. response time 59 ms Fastest avg. response time 27 ms
Now Pingdom only does US and Europe testing... nothing in Asia where is looks like Dynect is stronger. But their network is no where as strong as they say it is. I have done as many trace routes as possible and I can never get a query answered in their singapore or australia locations.
So really... I do not get it.... Where is Dynect faster? Now I know this is only for the past month.... but really.... I think DNS Made Easy runs a hell of a network and they are a fraction of the Dynect guys (whom I have negative feelings about anyway).
Looking at tools like www.dnscomparison.com it looks like DNSMadeEasy is fastest some weeks, Dynect is fast other weeks, UltraDNS is faster some other weeks. Of course I'm not sure how "honest" this is as well.
But create a pingdom account... do some tests... be interested in seeing other results.
So far I say that DNSMadeEasy is as fast or faster then the ones that are many times more expensive.