Now for a bit of an ironic story regarding SC2. Late last night I dual booted my system with Windows 7 Ultimate again due to the need for an embedded youtube video to work in an Office 2007 power point presentation (it failed to work under Crossover and youtube plays poorly in VMs, thus native install was my only option left). Back on topic - since I had Windows installed anyways I figured I would copy over my SC2 files (god bless Blizzard and their portable installs) and see how comparable the performance was on the native operating system.