I stand corrected. Google does not respond to incorrect domains. I mistook the auto search from the address bar in firefox as similar behavior to OpenDNS.

I hope this comes across in the constructive manner I intend it: when I am curious about a network issue, especially DNS related, a browser is never the tool I use for asking such questions. If you're on a modern OS then "dig" is an amazing tool, and on that other OS "nslookup" will do in a pinch.

There is a cache flush tool for Google DNS too!

https://developers.google.com/speed/public-dns/cache

I am reminded of the Apple slogan "Redmond, start your photocopiers!"

Google just does it in the browser. (they call it "omnibox")