I am sure people have been experience the "lag" from Windows Vista unless they had powerful machines and long hoped for the first service pack to be released. Well, some bad news is that a software development company in Florida, Devil Mountain Software, stated that Windows XP (beta Service Pack 3) has 2x the performance of Vista (Service Pack 1). Vista's first ever service pack is supposed to be released early next year and is supposedly said to boost the operating system's performance.
The competition resulted in Vista taking over 80 seconds to complete the test, compared to the XP's 35 seconds. Vista's performance increased less than 2% compared to the performance without SP1 while XP's SP3 improvement resulted in a 10% gain. The tests, run on a Dell XPS M1710 test bed with a 2GHz Core 2 Duo CPU and 1GB of RAM, put Microsoft Office 2007 through a set of productivity tasks, including creating a compound document and supporting workbooks and presentation materials.
This can definitely be an issue for Microsoft as it aspires to increase it's sales of Vista, especially to businesses. It's no wonder my notebook has to "think" to open a PowerPoint.