Some have faster response times than others.
A Domain Name Wire reader recently notified me about a speed study that BunnyCDN performed. The content delivery network that helps speed up load times tested 42 top level domain names for their DNS resolution time. Here’s what it found:
The top six performers—.biz, .buzz, .club, .co, .us and .in—use Neustar for registry services.
The next eight top level domains are Donuts’ domains, which seem to use Neustar’s DNS services as well. You’ll note other clusters, such as Verisign’s .tv/.com/.net.
BunnyCDN noted that part of the problem with some TLDs is that some of their nameservers performed worse than others. Also, the group found that response time degraded significantly outside of North American and Europe for some TLDs.
The content delivery network pointed out that DNS response time isn’t the biggest factor in a site’s performance, but I found the study and results interesting.
(Hat tip: Jorge)