I wonder if "0w16" might not be thinner at cold temperatures than, say, 0w50, there's just no easy way to advertise it since they've already hit zero?
Anyway the gains seem to be enough that Honda and Toyota are chasing making thinner oils available.
EDIT: The Ravenol 0w16 on Amazon is rated at 7.24 / 38.36, as opposed to 8.7 / 44.8 (100c/40c). I'm going to poke around and see if I can find any numbers for green oil and NEXT.
EDIT2: Apparently Honda's Green Oil was rated for 8.154 @ 100c and 32.1 @ 40c.
EDIT3:
This thread on botog has a Blackstone analysis of the NEXT oil, that claims 5.13 @ 100c and 20.844 @ 40c.