It would be interesting to see those metrics on sync adoption.
I can tell you from my own personal, anecdotal experience, it's one of those things as soon as someone knows about (and fully understands) they typically become Chrome users everywhere because of it. I found this to be the case for our Apps domain users at work and even friends & family who just have personal Google accounts and maybe even use iPhones, etc. It's powerful to show someone that your history, bookmarks, and even open tabs across devices stay in sync. I find that if one isn't "creeped out" by that, they usually think it's extremely convenient.
