different nameservers depending on tld

[jamesbond]

Hi,

I notice slow response times with domains (not cached by nameservers) that have a tld that is different from the nameservers' tld.
dnsreport.com mentions this also

For example:
I use nameservers that have a .com tld.
.us domains seem to take longer to resolve than .com domains on the same server.

Would this problem be solved by adding extra nameservers in WHM?
How can I do this? (it seems the only way is to create reseller accounts)

For .us domains I would then use:
ns1.nameserver.us
ns2.nameserver.us

For .com/.net/.org domains I would use :
ns1.nameserver.com
ns2.nameserver.com

Is there a way I can select different nameservers without have to create resellers?

[gic]

Sure. When you click "Server Setup" there is an option for "Managing Nameservers". Click that. Then at the bottom of the page there is a box for creating a new nameserver. That should do it.