For me it was a lot faster, it literally took a minute to sync my ipad and 30 seconds for my iPod, and like 3 minutes to back up my iPad and a minute to backup my iPod touch. Usually on iTunes 9.2 it took like an hour to sync my iPad, and like 3 to back it up, so yeah, from my experience it has sped it up greatly.
Is iTunes 10 really that much faster? Faster booting? Faster syncing perhaps? Tell me, cause i might upgrade :)
http://mobile.sciphone.net/index.php Here's the website I got it from, in the 3D section. I'm on my iPhone so I can't post the actual image. I'll post it tomorrow though :)