To add to what Prem said: 192.168.1.1 is your home router. Your router
is both forwarding DNS requests (to your ISP's recursive DNS server),
and also storing ("caching") the results on your home network. Those
locally cached results are really close; if you look the same name up
again, you'll get the result incredibly quickly.
Connect to your router and look at the DNS settings. It might tell you
what DNS servers it's using; if so, you can use namebench to compare
those nameservers against 220.127.116.11 and 18.104.22.168. If not, a quick search
for "Etisalat DNS configuration" suggests their nameservers are
22.214.171.124 and 126.96.36.199.
If the Etisalat nameservers appear to be slower than the Google Public
DNS nameservers, try configuring your router to use 188.8.131.52 and
184.108.40.206. That way, you'll get the best of both worlds: fast local
caching, and a fast recursive resolver when you have no locally cached
results. (You'll have to subjectively compare this combination over
what you currently have.)
It might be that your ISP offers excellent DNS service. If so, congratulations!
Thanks for your report. --PSRC (Google Public DNS software engineer)