ICloud – Is bookmark sync biderectional in iCloud for Windows

It seems that it may be tied to the Fetch New Data setting in Mail, Contacts, Calendars.

When I change that setting to Push, the bookmarks are sent out straight away.

What I don't understand is why the Photo Stream pushes out changes immediately, even if 'Fetch New Data' is set to 'Every 15 Minutes', but the Bookmarks (which appear to have nothing to do with 'Mail, Contacts, Calendars', are not.

Later:

I've just seen the "Advanced" setting in "Fetch New Data". This seems to have a manual override

With Fetch New Data set to "15 min", (and Push is Off), and iCloud set to "Push", I expected to have the bookmark pushed out straight away.

But this doesn't happen: I also have to turn the main "Fetch New Data" setting to Push, in order to have the bookmarks updated immediately.

Well, as a workaround, you could use Xmarks.

Syncing your bookmarks with Xmarks works with both Chrome and Safari, so anything you add in Safari will appear in Chrome and visa versa.

That way you can also add a bookmark in Chrome, it will sync to Safari over Xmarks and then out to your iOS devices with iCloud.

Probably not what you wanted, but it will work. It's what I ended up doing.