How to develop a site like InstantDomainSearch.com

I see this site to be very fast and domain name availability results return in a flash. Really its faster than any AJAX based search.

Do they setup dedicated servers behind it or cloud database? Need your thoughts on this.

Site is: http://instantdomainsearch.com/

Thanks in advance.

Imran

There’s no reply after 60+ views. Have I posted it in wrong category?

I wouldn’t go by the number of views, just need someone that knows to stop by (I could take a wild guess).

Just in case I’ve moved it to General Development Issues.