Good point. I wondered why this didn't happen under my Chrome, but I have a different search engine and have unchecked the box under Settings->Advanced->Privacy.
I'm not sure what gets sent with regards to spelling helpers? That could almost be like a keylogger? I wonder how it works. I've turned that off also.
All of those people entering partial URLs in the omnibox, causing a Google search, releasing CO2 is terrible when they could be using local bookmarks.