It all depends on which programs you run, and how many at one time you have running. I've had plenty of drag running multiple apps on Vista, running on an HP Pavillion with
2 Quad processors at 2.5GHz and 4G RAM.
I don't dislike it either, it just feels cheap and lethargic running along side of Leopard.
Of course. Meanwhile, I bet more and more Fortune 500 companies are adopting Mac OS X than migrating to Vista.