On google search, you have the variable window.location.search = "?gfe_rd=cr&ei=XXXGyZiVNHoFcuF8Qe7wYHACw&gws_rd=ssl"
That string is appended to the url of the iframe: src="https://foobar.withgoogle.com/"+window.location.search
The code snippet will only load the URL with appended values if there are present in the parent URL: e.g. https://www.google.com/foobar/?some_query_string
Why do I find it irritating? Because it seems both elitist and adolescent, in a child-like "secret society" sort of way.
That pretty much sums up the people I have met that work in Google engineering. I have only met a few at conferences, but thanks for putting words to the initial feelings I got from them all.
If your Google searches are not linked with your Google account or if you search using different search engines, you're out of the game.
EDIT: Turns out you need a history of googling this stuff. My heavy Python phase in school was timed wrong it seems.
I'm not signed in to Google as a matter of course, and I block their ads, so I provide them very little value. As a result, I won't be able to use "foobar", whatever the hell it is.
Seems fair. Isn't really that irritating, is it? :-)
Has it occurred to any of you that we might do these things for sheer fun, because doing that is not only allowed but celebrated?