New digging in the iOS 5.1 beta has given a possible clue as to Apple's target date for the OS. About 11 new carrier profiles all have references to an Apple diagnostic web address with "09Mar2012-Update" in the timeframe, suggesting to YourDailyMac's discoverer that the date was at least being kept in mind for a launch or a milestone. It touched on all existing iOS devices and at least five countries, pointing to a simultaneous release.
