Eh, not sure a barely 1% increase means anything. XP is old and done, time for people to move on.
Well, that may be ID, but apparently many companies absolutely refuse to upgrade and expect Microsoft to support until they decide it's time to change. Personally I prefer XP to Vista or 7 myself, it looks a helluva lot better IMO, and I will hold onto it and continue to skin it until Microsoft drops support, supposedly in 2014, but I hope not. Of course I have Vista and 7 also.