Don't take this the wrong way but, is it that OS X is getting faster and faster or is it finally getting to the way it should have been written in 10.0? All these updates are nice and all, but this is the way that it should have been written in the first place. I'm not talking about adding features like Expose and stuff, I'm talking about responsiveness. Is it OS X getting faster because they are fixing the things that should have been fixed originally or is it that it is getting faster because they are adding new features? And is windows making your computer slower, or introducing new technologies and abilities that require faster processors and such? Luna is a new rendering engine for XP and has higher requirements than the ones found in 2k, ME, etc because it does more. Personally I think 10.0 should have been as responsive as 10.2. Apple controlled everything about the OS and hardware it would be running on, there wasn't an excuse to have to wait till 10.2 and 10.3 to get these speed improvements. It is impressive that XP can run on any random x86 hardware out there in a bajillion different combinations and run as well and as fast as it does. Just my $0.02. BTW I'm using Panther, Jaguar and XP Pro on my various computers.