Good news for sure.. or at least it will be once it's real.. I call fake on this.. Seems more like a parody aimed at all the recent builds.. The Final RTM build will no doubt take a jump in build numbers but I don't think this is it..
According to there and various other sites microsoft are saying 7600 is not the final RTM. But it has been said microsoft do this thing a lot so 7600 could be the RTM but microsoft wont announce it yet.