Ok, there has been a bit of backlash, which was expected when the decision was made, and making it wasn't easy. We had lots of thing to take into account – the amount of development time we had left, what features we’d have to drop, whether it would improve gameplay or not, Microsoft’s research into the matter, and various other things. And we’re happy with the results, as everyone who saw it over the last few days was.
The renderer is running at a rock steady 30fps with the rest of the game (AI, car dynamics, controller input etc) running at 60 Hz, which makes the gameplay is as sharp as it would be at 60 Hz. A solid frame rate is far more important that a high framerate that dips.
This lets us run with hugely detailed scenes, FSAA, the environment mapping on the car and buildings running at full speed (something we weren’t able to get in for the first game), self shadowing cars, 8 car races, and the audio system we have. It’s a matter of preference, but we believe the trade-off is worthwhile.
We hope those who aren’t too keen on the idea will come round, as the game has a lot more to offer than it’s framerate.