Really? Hm, interesting. I always see computer coming with Vista and I heard Microsoft was going to stop supporting XP this year, but looking it up now apparently you'll be able to buy copies of XP until 2009. So yeah, looks like XP is here to say for a while longer.
I still don't have problems with Vista, but yeah it's a CPU hogger. I don't see any reasons to downgrade back to XP though, so I'll be sticking with it. However, I'll give it a bit more time before permanently labeling it 'worse operating system ever' like so many people have labeled it so far.