It's an interesting idea, but based on some early tests it looks like a losing bet to me. My ping from a dedicated 15mb Qwest circuit to 8.8.8.8 and 8.8.4.4 is

It's an interesting idea, but based on some early tests it looks like a losing bet to me. My ping from a dedicated 15mb Qwest circuit to 8.8.8.8 and 8.8.4.4 is between 57ms and 75ms. However, cached DNS resolutions run at around 12ms from our default DNS servers. Even uncached resolutions are still way faster than the round-trip to Google. Google Public DNS might be worth it if every single one of your DNS queries would result in a cache miss, but otherwise I don't see the performance improvement Google is gunning for. That said, it is nice to have a public option.