are car adverts any use?

Is any one else fed up with car adverts that tell you nothing about the car? The latest is the Renault one where a car is hung from the ceiling in an art gallery. I know they want you to think it's a work of art (it's another car, for heavens sake!!) but if you are buying a car, which is a big investment, surely it is more important to be told about the actual specification, performance etc. I know advertisers think we're all idiots, they must do or they wouldn't make adverts, but come on, give us some credit!