No Bluetooth 4.0 in S3
Samsung is aware of the problem and has described it as a "bug", despite the fact that it was obviously a complete oversight. The S3 marketing and packaging material claims with no disclaimers that the phone supports Bluetooth 4. Many developers have confirmed that there is no bug - there is no driver or API for the latest version of the protocol on the phone, even in the more recent Jelly Bean update.
I found out about it when I supported Variable Technologies' NODE device on Kickstarter, received my Bluetooth 4.0 BLE model, and couldn't use it.
Samsung knows about it. All I know to do now is complain in forums and to media outlets in the hope that Samsung will put a higher priority on the "bug fix".
What kinda dumbass company really thinks making a 5.5 inch 'phablet' is sustainable? They even released a Galaxy camera and a separate iPod Touch wannabe device as well. So dumb, sooo dumb!