There really isn't much lag between updating a preference in iCloud and it syncing to other devices. Not realtime, but not bad :)
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
There really isn't much lag between updating a preference in iCloud and it syncing to other devices. Not realtime, but not bad :)