[citation][nom]alandjackson[/nom]If a 460 and a 580 both hit 60fps, that doesn't mean that Rage doesn't take advantage of the 580. It means that on the 460, the game automatically scales down TONS of internal options for you.[/citation]
Not really.
First, it means the game has a 60 FPS limit.
Second, yes, the game is capable of scaling detail; but there's no detail to scale down once you have decent graphics hardware like a 5770 or 550 Ti. Our experience suggests this, and the video we took supports it.
You're assuming there's a lot more going on than there is. The game's designed for consoles, remember; there's no hidden features that a high-end card like the GTX 580 unlocks.