Last year, the Bell South or AT&T DNS Servers went down so I switched to OpenDNS. Today, I noticed that several websites were not found on the OpenDNS servers so I switched back to the AT&T DNS servers. The AT&T DNS servers appeared to be much faster than before. I think the OpenDNS servers are better used as backup DNS servers.
It's really nice to have an Apple iPhone so that I can use Edge to test access to the website.