Re: Just what were you running exactly???
My iMac seems to have slowed down considerably since I upgraded the OS.
Don't upgrade (I'm making the bold assumption that your use of upgrade implies exactly that rather than fresh install) but clone the disk (if not using time machine), format, install, and migrate data etc back where possible. I've always found that in-place upgrades are a touch lack-lustre no matter whether it is Linux, OS X or Windows and generally result in the OS running slower.
Biting the hand that feeds IT
