Since no news on the 2013:
I just picked up a Dyno LTD 17m (closer to the 2013 than the 2012). Only used it once in light gusty conditions, but my initial impression vs. my 2011 Dyno 18m is that it is faster turning, less stable, lower aspect ratio, and better relaunch.
Can't comment on twin tip jumping, there was barely enough wind for the twin tip, so switched to my raceboard.
Less stable might have been because of the gusty wind, Will have to try the two kites back to back to be sure. I fell on a tack and the kite tumbled out of the sky in about 10 knots. From my experience with the 18m, I don't think the 18m would have done that in this situation, so it surprised me. The 18m just seems to hang there in the sky no matter what.
Also flying on the same bar that works perfectly for all my other North kites, had to pull the trim strap most of the way in (4 inches) to stop the kite from oversheeting and backstalling
Hopefully some line adjustment and steady wind will clear this up.