Samsung has released the source code for the 4.1 updates of the Galaxy Tab 2 (both the 10.1 and 7-inch versions) and the AT&T branded Galaxy Note 2. This consists of the parts used that are GPL licensed, and required to be released by the agreement Samsung is bound to by using the free code. 

In short, Samsung did what they always do, and what they needed to do to be compliant. It's time we stop congratulating these companies for doing what they are supposed to do, and instead be on the lookout for the times they don't. 

Source: Samsung