Changed twitter username, old one still shows up in google?

[dewcoons]

Nope. Once it is on Google it is there for life. That is old information that is stored on the Google servers. And it will be there "forever". Changing your account name does not automatically change all the information. (How is Google suppose to know that you changed the ID?)

Given time, as it is accessed less and less it will eventually "disappear". But every time you search for it to see if it gone, you active that information again.