Well, it is true that 10.1.2 is nothing to sneeze at, but unless you have a bug that needs squashing, there isn't much to wait for. Other than the long (~100) list of bugs squashed, there isn't much else. A little more stability, but if you are already fairly panic-proof, you won't notice it. So, 10.2 is the thing to be clamoring for, not any of the 10.1.x bugfixes (unless you are still plagued with a certain bug Apple is in the process of fixing)...
BTW, the initial 10.1.2 build is 5P28, and works okay, the second is 5P48, BUT, one person who installed it had some major issues with one of the frameworks it updates. Ew.