Every Prius/Insight/Civic Hybrid/Fusion Hybrid already have these tires (or similar). And I don't see the ditches lined with them every winter. The only correlation I see with being stuck in the ditch is RWD and overconfidence.
Don't get me wrong, I'm sure they're not good, but no worse than tires with 2-3-4/32nds of tread, or summer tires both of which I see all the time. Parts of Canada have mandatory snow tires, my state doesn't even require M+S tires, or any tread depth over 2/32nds, and there's no inspection for anything anyway.
Interested to hear about these, but I'm sure it will be a few months before tirerack has any good reviews, especially with the limited sizes they offer. I wonder what tires we'll be getting OEM on cars when CAFE requires 35cafe/28epa combined mpg.
I would worry that at 130 bucks apiece, they won't save enough in gas to cover the premium over an 80 dollar second-tier tire.