PGR3 framerate issues?

Recently there was the story of how Project Gotham Racing 3 just looked too damn good, and folk assumed the pictures weren't real. The developer then went out of their way to say "Honestly, they are, and here's proof!"

Well, yet more controversy, if that's the right word. (It's seems a little overblown.) Apparently the developer won't confirm that the game will run at 60 frames per second. The argument being they'd look pretty stupid if they confirmed it was 60fps, and then a glitch forced them to release a game that ran at 30fps. So don't expect to know what sort of speed PGR3 runs at until pretty close to it's release.

Is this the price that may be paid for those exceptional visuals that are supposedly real?