Just drove my Corvette with these tires through the recent Christmas snowstorms in the Northeast US. These tires provide terrific traction on snow covered roads. Such poor conditions that the speed limit on I-81 was reduced by PennDOT. Was able to pass many others on the road while they were spinning their tires and I was confidently cruising. Many confused looks from other drivers on all-season tires while I passed them. A lot of other cars and trucks were off the road and I hardly had any issues, with traction control activating only twice in the 3 hours it took to travel from Binghamton NY to the Delaware Water Gap.
Cannot comment on traction in deep snow, but if the snow gets any deeper than 3 or 4 inches, the front air dam will be a snow plow and I wont be going anywhere anyways, but up to that point, these tires are very impressive.