said by TSI Marc
Can you point to a thread on here where that was proven to be our server.
Each time I've seen this it turned out that it was the site at the other end that was in fact down or had their dns records messed up and only showed up on google or opendns because those had not yet updated to the latest records or visa-versa..
I know when I've experienced the issue, it was not caused because the website was down. I don't know for sure it was a TSI DNS server issue, I just know that switching the DNS server I used solved the issue instantly.
Could it be related to caching as derekm suggests? Perhaps in the odd instance.
Either way, good work on speeding things up.