A good presentation by Siva Kumar Harinath (Senior Test lead from Microsoft) Analysis Services builds confidence that SSAS 2008 Scales better than SSAS 2005.
I am excited to see the below slide, which provides high level Road map of SSAS.
In the above image they mentioned that the mission of SQL 2005 has been completed in SSAS 2008. This seems to be true with the below information.
Microsoft Adcenter orignally built their Business Intelligence solution for their online advertising compaings on Microsoft Bing. They shifted their current application from SSAS 2005 to SSAS 2008 and noticed significant performance improvements without any changes and they got more opportunity to tune it further. Following URL contains the complete information on the same.
Below Image clearly confirms that shifting their current app from SSAS 2005 to SSAS 2008 cut down their half oftheir processing time.