I disagree. Snow Leopard does feel like a refinement. I get better performance and user experience with Snow Leopard than I did with 10.5.8. I just proved that to myself by running an old backup.
Do you have any experience testing something as massive an OS? The test lab and beta testers can only test so many configurations. At some point, you just have to release the OS and see what happens in the real world. You hope no major bugs show up but you know bugs we will show up that you never saw in testing.
Snow Leopard, for the vast majority of users, is just fine.
S-
I hope you said all of this about Windows Vista, as well.