My 17" PowerBook is now graced with a (legal) copy of Leopard. The first thing I noticed was the improved startup time. This thing boots FAST. Faster than Tiger. Also, Dashboard loads widgets a lot more quickly. I was expecting some slow-down, since I have a PowerPC Mac, but I am pleasantly surprised at the performance INCREASE that I've experienced so far with Leopard. Mind you, it's only been a few hours. Oh, and my PowerBook sleeps a lot faster now too. More to come.