That's a little ridiculous. iTunes on Windows is terrible compared to the OS X version (the same goes for Safari) and iCloud, as a cloud system baked into OS X, is much better intergrated than the Windows version. I also fail to see how iOS devices work better with Windows. I'm not going to argue that it's magnitudes better on the Mac but how does Windows handle USB syncing "just as good if not better"? Care to elaborate on how this is so?
I have found Safari to run less efficiently on my WIndows machine but have had no issues with Itunes. I see no diffference in performance compared to running Itunes on my Macbook. I have been using Itunes on the PC for five years and it works just as seamlessly as it does on the Macbook. Synching to my Ipod or Ipad offers the same performance. Operationaly, I notice no practical differences. I don't use Icloud, however so can't comment on that.