I recently upgraded from my 15" 1.25ghz G4 Powerbook with 1Gig RAM to a 15" 2Ghz Macbook Pro with 512MB RAM. The MBP has a brighter screen, better speakers, better backlighting and the iSight. But in practice, it seems a tad slower -- or at least no faster than the powerbook. I typically have Mail, Safari, Adium, Skype, iTunes and a bunch of widgets open. There is occasionally some lag with dashboard and with placing my cursor on new apps. I know I have less ram, but even so, I had really expected this machine to be a much faster one. And as I whined about in a past post, I have so far not been able to install Windows XP on this machine, which was my main incentive to upgrade (I can use bootcamp to partition and then load the Windows setup CD, but when I'm prompted to hit enter to continue with the setup, it doesn't seem to register any response). Can't get past this and Apple doesn't provide support. Can it be that Rosetta is slowing down the machine drastically? And is it common not to be able to install XP?