I justed tested this myself via logging the DNS queries, and yes, this is true.

> the first word

No.

The answer appears to be yes if you said "the only word", though.

...which the first word would be, as you typed it?

I think this only happens after you press enter, not as part of the omnibox real time results. After all the infobar mentioned in the article definitely only appears after you commit the search query.

depends how fast you type - there's a delay on the query so it's not re-querying for every keystroke. but probably yes.