Looking at the Apple Store it appears that Leopard may well not be landing on door steps this Friday. As of 6pm on 24th my copy of Leopard is still showing as Not Yet Shipping and an estimated Shipping date of 26th. So it looks like delivery is likely to be early next week ( 28th-29th ? )

Macrumors.com has an unconfirmed report of someone who has apparently got hold of final release version of Leopard and has installed and reviewed. Interestingly many of the comments refer to “blazing speed” which is a good to know! It is certainly interesting to note that most versions of OS X actually improve on the performance of the previous version, unlike Windows which consistently runs slower and requires more power to acheive the same levels of performance.