If the router gives a different dns then you'd be waiting 60 seconds or more for 192.168.0.1 to time out before a page loads... best to just modify /etc/resolv.conf directly if you need to.
Good point timothy,
I guess I should have said your DNS server
Problem I found was if you have a subnet with just your RaspPi The Rasp PI does not know what the DNS server is.
echo 'nameserver 192.168.0.1' | sudo tee -a /etc/resolv.conf
Above is just as bad as if there's a duff entry in resolv.conf possibly created by DHCP client you put the correct nameserver after the bad one and you still get delays.
If you change to static IP the resolv.conf may still have this wrong information.