No doubt you are right, probably about all of this. But at first look, to me, it looked like CoffeeScript. More importantly my HN title is amusing, and we can always use a little more fun.
I see the humor you're trying to play here, but things like this are actually kind of rare-- microsoft offering a contribution to the open source community with zero gain to their own systems, and respecting established standards. To imply that they're ripping off CoffeeScript is irresponsible, and downplays the significance behind their work. I for one will be looking for ways that I can contribute to this project as it mitigates nearly every concern I had WITH coffeescript.