At Progressive, drivers' rates drop by an average of 10% when they turn 18 and another 16% at 21. As your teenager becomes more experienced and avoids tickets and accidents, the price should keep going down. Remember, teen drivers are also eligible for the Good Student Discount and can participate in Progressive's Snapshot® program, which decreases the rate for safe, low mileage drivers.†
Being in the business for a very long time, I have found that most people are clueless about insurance, even most agents who sell them. I will agree that their rates are cheap. But I wouldn’t recommend them. Inexperienced adjusters. They do not fully investigate. The policy does not cover like, kind, and quality which is bad if you have a new vehicle.