Actually it says "Now you can render your favorites scenes over 30% faster on average. " Scenes with lots of image textures render much faster but scenes with Premium Render Effects (like soft shadows) are slower then 5.0.1. How fast Bryce goes is totally dependent on the scene, not 30% faster for all scenes. So that's not really a fib, just PR speak. Although that's only true for the PC ;-). The Mac version is slower in all cases I've tried (and I've tried alot!).