(Incidentally, how do you write that? “Mac OS X.5″ is just wrong, whilst “Mac OS 10.5″ isn’t as aesthetically pleasing… oh well, I guess it fits into our multiply-redundant world of “PIN numbers”, “tuna fish”, and “software programs” 
Anyway, on to my initial thoughts on Leopard!
The excellent Phoronix have a series of benchmarks of Enemy Territory: Quake Wars on Linux and on Vista… and, using a 512Mb ATI Radeon HD 2900XT with the latest drivers for each, the exact same machine managed a frame rate just over 19% higher on Linux than on Vista!
Just incredible – the story of the attempt to cross the United States of America by car in less than 32 hours 7 minutes…
Read the personal account at www.wired.com.