I heard this from various tech people in computer stores. xp is supposed to be much more cpu intensive, resource hog, etc. So you're saying that if you had a choice with a new OS install that is going to be primarily for gaming from HL2 and onward for the next 2 years, install XP?
I would install XP in a heartbeat. It's the best OS Microsoft has ever released. Put it this way: game developers develop their products specifically for WindowsXP first, everything else is secondary.
XP is based on the same NT kernel as Win2000, but with much more focus put into gaming and multimedia functions. Win2000 is an OS designed for the business/work enviroment. I'm not saying it's bad
, mind you, but it's actually less game-friendly by it's nature than XP.
And btw, from "tech guys in computer stores" is about the last place you want to get valid PC tech information from