Lets see...
1) My XP boots dead slow novadays due to lots of installed software (my gf to blame), eventhough registry has been cleaned.
2) Documents and Settings-folder.. 656mb .. and I ain't got even one god damn document saved there. Thats loadsa settings.
3) Windows-folder is almost 2 gigs.
4) It's awfully slow in general use, one big reason being hd fragmentation. IE loads in about 5 secs or so
5) Swap is yelling for mercy eventhough I have half a gig memory
the OS is utter ####, when I first used it, it felt like a step forward .. but I don't know.
The only things gone forward is networking and hardware support.