According to an online report, Galaxy S3 owners will not have to wait for a long time to get Android 4.1 for their devices. In fact, the update is already making rounds as public builds have been leaked and several users are already using it on their devices. Note and S3 owners will have to wait for slightly more time with Samsung Galaxy Note and S2 phone owners getting it sometime in Q4 2012.
Keep it in mind that these are only rumors and Samsung itself is yet to confirm these dates. [via droiddog]. Alternatively, if you own Note, you can download Galaxy Note CM10 release. CM10 and CM9 has also been released for S3.