Im not wrong , ive worked with vista since before the day it came out as my company gets advanced copies of all microsoft products. I have never had a problem with vistas performance or any other aspect except for user accounts being locked down which is overcome easily. As long as your pc is up to spec it is fine and stable.

Saying that though there is nothing at all wrong with XP and i still rate it and would happily use it as vista doesnt offer any realy advantage over it other than looking prettier.