Chicago is midwest in geography and climate only. Someone who grew up in a typical small midwest town would feel as out of place in Chicago as in San Francisco, New York, or Paris.
Probably the closest to the vibe the person is looking for would be the Google Waterloo office where I work, or the Pittsburgh office the other poster mentioned.
It's true the sales people do out number us here in Chicago, but we do have O(100) engineers in the office. We are working on lots of cool stuff: Ads, Search, and Privacy to name a couple.