As someone who's been waiting for that '0.12 soon' for over a year, io.js releasing as announced is amazing (even more-so is their open communication).
By comparison, @nodejs announced on Dec 17th, 2014 that 0.11.15 was "tomorrow", but still haven't released anything: https://twitter.com/nodejs/status/545349270241435648
On the other hand, they've been saying that 0.12 will come out 'soon' for over a year, so this too may take longer than I expect.