"Slow" isn't even close
A friend brought her Vista-powered laptop over a few days ago so that I could transfer some files for her. It was slower than the proverbial slug with the caravan full of elephants (hat tip to Paul Probine for that wonderfully accurate description). Didn't notice any problems with the wifi though, running OS X and XP Pro on the network and the Vista machine was easy enough to set up, just really, really slow. And it's running a faster processor with more RAM than the much older XP machines that leave it for dust in the performance stakes - I'd love to see some benchmark test results for simple PhotoShop operations !!
Oh, and they've managed to change a perfectly good GUI into something that is now more confusing, unworkable and, generally, pants. WTF were they thinking? Will NEVER make the move to Vista. But then I'm spoilt because I do most of my work on the wonderful platform that is OS X.
You know what they say: An Apple every day keeps the doctor away (that'd be the doctor who brings you the white coat with the sleeves that tie at the back if you have to use Vista for a prolongued period).
(STOP - because it's about the same speed as Vista)