It has to be said that, in answer to the questions posed in the previous post, there are no statistics officially kept which either prove or disprove those theories.
That being said, there are strong suspicions that car insurance companies keep a closer watch on, say, the drivers of hot red sports cars than they do on the drivers of more sedate, mundane type vehicles.
Car insurance companies will typically charge higher rates for sports cars, because there is prove that those driving these types of cars are more inclined to get speeding tickets and even to get into accidents.
You will pay less for a sedan or SUV than you will for a sports car, because they are simply considered safer. Likewise, your rates will typically be less for an older car than a brand new one.