I grew up in a town of less than 30,000 people: College Station, TX. Right when it came out, I recall playing it in a Dillards and buying games for it at a Sears. Later in the Turbo's lifespan, you could still buy games for it at McDuff, Toys R Us, and Babages.
All that being said, I didn't know anyone else that had one. As an adult, I've met several people who had turbo stuff while they were growing up in Dallas.