John Casasanta:

As the video shows, in our OpenGL ES testing, the 3GS is generally close to four times faster than the 3G. Results will vary depending on the application but this is remarkable to say the least.

It’s no surprise giving the new graphic chips in the iPhone 3GS but it worth mentioning. And these guys didn’t use any OpenGL ES 2.0 (e.g., shaders).